Near-Earth object - Knowledge

2159:: NEAs can also transfer between solar orbits and distant Earth orbits, becoming gravitationally bound temporary satellites. According to simulations, temporary satellites are typically caught when they pass Earth's L1 or L2 Lagrangian points at the time Earth is either at the point in its orbit closest or farthest from the Sun, complete a couple of orbits around Earth, and then return to a heliocentric orbit due to perturbations from the Moon. Strictly speaking, temporary satellites aren't co-orbital asteroids, and they can have orbits of the broader Arjuna type before and after capture by Earth, but simulations show that they can be captured from, or transfer to, horseshoe orbits. The simulations also indicate that Earth typically has at least one temporary satellite 1 m (3.3 ft) across at any given time, but they are too faint to be detected by current surveys. As of August 2023, four temporary satellites have been observed: 2274:, in the outer reaches of the Solar System. The orbital period distinction is of importance in the evaluation of the risk from near-Earth comets because short-period NECs are likely to have been observed during multiple apparitions and thus their orbits can be determined with some precision, while long-period NECs can be assumed to have been seen for the first and last time when they appeared since the start of precise observations, thus their approaches cannot be predicted well in advance. Since the threat from long-period NECs is estimated to be at most 1% of the threat from NEAs, and long-period comets are very faint and thus difficult to detect at large distances from the Sun, Spaceguard efforts have consistently focused on asteroids and short-period comets. Both NASA's CNEOS and ESA's NEOCC restrict their definition of NECs to short-period comets. As of March 30, 2024, 122 such objects have been discovered. 1519: 414:, thus an NEO is either a near-Earth asteroid (NEA) or a near-Earth comet (NEC). The organisations cataloging NEOs further limit their definition of NEO to objects with an orbital period under 200 years, a restriction that applies to comets in particular, but this approach is not universal. Some authors further restrict the definition to orbits that are at least partly further than 0.983 AU away from the Sun. NEOs are thus not necessarily currently near the Earth, but they can potentially approach the Earth relatively closely. Many NEOs have complex orbits due to constant perturbation by the Earth's gravity, and some of them can temporarily change from an orbit around the Sun to one around the Earth, but the term is applied flexibly for these objects, too. 1147:

It has a diameter of about a kilometer (0.6 miles), and an impact would therefore be globally catastrophic. Although this asteroid will not strike for at least 800 years and thus has no Torino scale rating, it was added to the Sentry list in April 2002 as the first object with a Palermo scale value greater than zero. The then-calculated 1 in 300 maximum chance of impact and +0.17 Palermo scale value was roughly 50% greater than the background risk of impact by all similarly large objects until 2880. After additional radar and optical observations, as of April 2024, the probability of this impact is assessed at 1 in 34,000. The corresponding Palermo scale value of −2.05 is still the second highest for all objects on the Sentry List Table.

808: 1161:) was assigned a 4 on the Torino scale, the highest rating given to date, as the information available at the time translated to a 1.6% chance of Earth impact in April 2029. As observations were collected over the next three days, the calculated chance of impact increased to as high as 2.7%, then fell back to zero, as the uncertainty zone for this close approach no longer included the Earth. There was still some uncertainty about potential impacts during later close approaches, however, as the precision of orbital calculations improved due to additional observations, the risk of impact at any date was completely eliminated by 2021. Consequently, Apophis was removed from the Sentry Risk Table. 13500: 74: 2786: 1292: 1542:: the narrower the angle of the asteroid and the Sun from the observer, the lesser part of the observed side of the asteroid will be illuminated. Another bias results from the different surface brightness or albedo of the objects, which can make a large but low-albedo object as bright as a small but high-albedo object. In addition, the reflexivity of asteroid surfaces is not uniform but increases towards the direction opposite of illumination, resulting in the phenomenon of phase darkening, which makes asteroids even brighter when the Earth is close to the axis of sunlight. An asteroid's observed albedo usually has a strong peak or 2229:, all historically observed meteors were produced by objects significantly smaller than the smallest asteroids then observable by telescopes. As the distinction began to blur with the discovery of ever smaller asteroids and a greater variety of observed NEO impacts, revised definitions with size limits have been proposed from the 1990s. In April 2017, the IAU adopted a revised definition that generally limits meteoroids to a size between 30 μm and 1 m in diameter, but permits the use of the term for any object of any size that caused a meteor, thus leaving the distinction between asteroid and meteoroid blurred. 762: 2100: 2463: 2251:(NECs) are objects in a near-Earth orbit with a tail or coma made up of dust, gas or ionized particles emitted by a solid nucleus. Comet nuclei are typically less dense than asteroids but they pass Earth at higher relative speeds, thus the impact energy of a comet nucleus is slightly larger than that of a similar-sized asteroid. NECs may pose an additional hazard due to fragmentation: the meteoroid streams which produce meteor showers may include large inactive fragments, effectively NEAs. Although no impact of a comet in Earth's history has been conclusively confirmed, the 1591: 1755:. The NEOWISE estimate differed from other estimates primarily in assuming a slightly lower average asteroid albedo, which produces larger estimated diameters for the same asteroid brightness. This resulted in 911 then known asteroids at least 1 km across, as opposed to the 830 then listed by CNEOS from the same inputs but assuming a slightly higher albedo. In 2017, two studies using an improved statistical method reduced the estimated number of NEAs brighter than absolute magnitude 17.75 (approximately over one kilometer in diameter) slightly to 2481: 343: 446: 1214: 651: 2238: 457: 1952: 13664: 10597: 1225: 1128: 2590:, which, as of April 2024, has the highest cumulative Palermo scale rating (−1.59 for several close encounters between 2178 and 2290). On its journey to Bennu, the probe had searched unsuccessfully for Earth's Trojan asteroids, entered into orbit around Bennu in December 2018, touched down on its surface in October 2020, and was successful in returning samples to Earth three years later. China plans to launch its own sample-return mission, 47: 172: 98: 13640: 1822: 1026: 2057:: Quasi-satellites are co-orbital asteroids on a normal elliptic orbit with a higher eccentricity than Earth's, which they travel in a way synchronised with Earth's motion. Since the asteroid orbits the Sun slower than Earth when further away and faster than Earth when closer to the Sun, when observed in a rotating frame of reference fixed to the Sun and the Earth, the quasi-satellite appears to orbit Earth in a 160: 1691: 13476: 1440: 13488: 1992:, in which an asteroid would orbit the Sun in fixed formation with the planet. Two of these, 60 degrees ahead and behind the planet along its orbit (designated L4 and L5 respectively) are stable; that is, an asteroid near these points would stay there for millions of years even if lightly perturbed by other planets and by non-gravitational forces. Trojans circle around L4 or L5 on paths resembing a 13652: 1710:, which is commonly assumed to be 14%. Such indirect size estimates are uncertain by over a factor of 2 for individual asteroids, since asteroid albedos can range at least as low as 5% and as high as 30%. This makes the volume of those asteroids uncertain by a factor of 8, and their mass by at least as much, since their assumed density also has its own uncertainty. Using this crude method, an 2305: 2095:: orbital calculations show that some co-orbital asteroids transit between horseshoe and quasi-satellite orbits during every horseshoe resp. quasi-satellite cycle. Theoretically, similar continuous transitions between Trojan and horseshoe orbits are possible, too. As of January 2023, at least 20 Earth co-orbital NEAs are thought to be in the horseshoe-like phase of compound orbits. 13628: 317:, rate the risk presented by an identified NEO based on the probability of it impacting the Earth and on how severe the consequences of such an impact would be. Some NEOs have had temporarily positive Torino or Palermo scale ratings after their discovery. Since 1998, the United States, the European Union, and other nations have been scanning the sky for NEOs in an effort called 2030:) in a horseshoe-shaped area. In both cases, the Sun is at the horseshoe's center of gravity, Earth is in the gap of the horseshoe, and L4 and L5 are inside the ends of the horseshoe. This orbital type is less stable than a As of October 2023, at least 13 horseshoe librators of Earth have been discovered. The most-studied and, at about 5 km (3.1 mi), largest is 1175:, having a diameter around 300 metres, was assigned a Torino Scale rating of 2 due to a close encounter predicted for May 4, 2102. After additional observations allowed increasingly precise predictions, the Torino rating was lowered first to 1 in May 2006, then to 0 in October 2006, and the asteroid was removed from the Sentry Risk Table entirely in February 2008. 884: 1349:(NEOWISE). As a result, the ratio of the known and the estimated total number of near-Earth asteroids larger than 1 km in diameter rose from about 20% in 1998 to 65% in 2004, 80% in 2006, and 93% in 2011. The original Spaceguard goal has thus been met, only three years late. As of March 2024, 861 NEAs larger than 1 km have been discovered. 2662: 1534:, were naturally also among the first to be detected. 1036 Ganymed is about 35 km (22 mi) in diameter and 433 Eros is about 17 km (11 mi) in diameter. Meanwhile, the apparent brightness of objects that are closer is higher, introducing a bias that favours the discovery of NEOs of a given size that get closer to Earth. 2285:

impact within the range of uncertainty. By 1993, even earlier returns (back to at least 188 AD) had been identified, and the longer observation arc eliminated the impact risk. The comet will pass Earth in 2126 at a distance of 23 million kilometers. In 3044, the comet is expected to pass Earth at less than 1.6 million kilometers.

421:(PHOs) if their estimated diameter is above 140 meters. PHOs include potentially hazardous asteroids (PHAs). PHAs are defined based on two parameters relating to respectively their potential to approach the Earth dangerously closely and the estimated consequences that an impact would have if it occurs. Objects with both an Earth 644:) passed approximately 27,700 km (17,200 mi) above the surface of Earth, closer than satellites in geosynchronous orbit. The asteroid was not visible to the unaided eye. This was the first sub-lunar close passage of an object discovered during a previous passage, and was thus the first to be predicted well in advance. 742:. One impact model based on widely accepted NEO population models estimates the average time between the impact of two stony asteroids with a diameter of at least 4 m (13 ft) at about one year; for asteroids 7 m (23 ft) across (which impacts with as much energy as the atomic bomb dropped on 1646:

that provides a continuing supply of near-Earth asteroids. Compared to the entire mass of the asteroid belt, the mass loss necessary to sustain the NEA population is relatively small; totalling less than 6% over the past 3.5 billion years. The composition of near-Earth asteroids is comparable to that

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and it poses no serious threat: the possible 2095 impact therefore rated only −3.32 on the Palermo Scale. Observations during the August 2022 close approach were expected to ascertain whether the asteroid will impact or miss Earth in 2095. As of April 2024, the risk of the 2095 impact was put at

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in low Earth orbit for six years from 1984. Impacts on the Moon can be observed as flashes of light with a typical duration of a fraction of a second. The first lunar impacts were recorded during the 1999 Leonid storm. Subsequently, several continuous monitoring programs were launched. A lunar impact

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was discovered during its transition from a temporary satellite orbit around Earth to a solar orbit in November 1991, and could only be observed until April 1992. Some scientists suspected it to be a returning piece of man-made space debris. After new observations in 2017 provided better data on its

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every year in August, has a roughly 130-year orbit that passes close to the Earth. During the comet's September 1992 recovery, when only the two previous returns in 1862 and 1737 had been identified, calculations showed that the comet would pass close to Earth during its next return in 2126, with an

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of 17.75 roughly corresponds to a diameter of 1 km (0.62 mi) and an absolute magnitude of 22.0 to a diameter of 140 m (460 ft). Diameters of intermediate precision, better than from an assumed albedo but not nearly as precise as good direct measurements, can be obtained from the

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telescopes in space that observe their thermal emissions instead of the light they reflect, with a sensitivity that is almost independent of the illumination. In addition, space-based telescopes in an orbit around the Sun in the shadow of the Earth can make observations as close as 45 degrees to the

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Such observational biases must be identified and quantified to determine NEO populations, as studies of asteroid populations then take those known observational selection biases into account to make a more accurate assessment. In the year 2000 and taking into account all known observational biases,

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was lost after its 1950 discovery, since its observations over just 17 days were insufficient to precisely determine its orbit. It was rediscovered in December 2000 prior to a close approach the next year, when new observations, including radar imaging, allowed much more precise orbit calculations.

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The frequency of impacts of objects of various sizes is estimated on the basis of orbit simulations of NEO populations, the frequency of impact craters on the Earth and the Moon, and the frequency of close encounters. The study of impact craters indicates that impact frequency has been more or less

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People in the early 21st century have been encouraged to see asteroids as the interplanetary equivalent of sea monsters. We often hear talk of "killer asteroids," when in fact there exists no conclusive evidence that any asteroid has killed anyone in all of human history. … In the 1970s, asteroids

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Scientists involved in NEO research have also considered options for actively averting the threat if an object is found to be on a collision course with Earth. All viable methods aim to deflect rather than destroy the threatening NEO, because the fragments would still cause widespread destruction.

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Near-Earth Object Survey Act, which calls for NASA to detect 90% of NEOs with diameters of 140 m (460 ft) or greater, by 2020. In January 2020, it was estimated that less than half of these have been found, but objects of this size hit the earth only about once in 2000 years. In December

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The main problem with estimating the number of NEOs is that the probability of detecting one is influenced by a number of aspects of the NEO, starting naturally with its size but also including the characteristics of its orbit and the reflectivity of its surface. What is easily detected will be

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became the first asteroid with a temporarily positive rating on the Torino Scale, with about a 1 in 9,300 chance of an impact in 2049. Additional observations reduced the estimated risk to zero, and the asteroid was removed from the Sentry Risk Table in April 2002. It is now known that within the

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were large enough to be tracked in space before striking Earth. It is now widely accepted that collisions in the past have had a significant role in shaping the geological and biological history of Earth. Asteroids as small as 20 metres (66 ft) in diameter can cause significant damage to the

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commercially. In a first phase, the company reviewed data and selected potential targets among NEAs. In a second phase, space probes would be sent to the selected NEAs; mining spacecraft would be sent in a third phase. Planetary Resources launched two testbed satellites in April 2015 and January

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showed a potential 2028 close approach 0.00031 AU (46,000 km) from the Earth, well within the orbit of the Moon, but with a large error margin allowing for a direct hit. Further data allowed a revision of the 2028 approach distance to 0.0064 AU (960,000 km), with no chance of

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has ebbed and flowed during the short time that NEAs have been scientifically observed. The 1937 close approach of Hermes and the 1968 close approach of Icarus first raised impact concerns among scientists. Icarus earned significant public attention due to alarmist news reports. while Hermes was

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is Earth's closest quasi-satellite, in an orbit that has been stable for almost a century. This asteroid is thought to be a piece of the Moon ejected during an impact. Orbit calculations show that almost all quasi-satellites and many horseshoe librators repeatedly transfer between horseshoe and

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In May 2022, an algorithm known as Tracklet-less Heliocentric Orbit Recovery or THOR and developed by University of Washington researchers to discover asteroids in the solar system was announced as a success. The International Astronomical Union's Minor Planet Center confirmed a series of first

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of natural disasters or wars; harmless spectacles in an unchanging universe; the source of era-changing cataclysms or potentially poisonous fumes (during Earth's passage through the tail of Halley's Comet in 1910); and finally as a possible cause of a crater-forming impact that could even cause

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As of March 30, 2024, and using diameters mostly estimated crudely from a measured absolute magnitude and an assumed albedo, 861 NEAs listed by CNEOS, including 152 PHAs, measure at least 1 km in diameter, and 10,832 known NEAs, including 2,406 PHAs, are larger than 140 m in

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NEOs have low surface gravity, and many have Earth-like orbits that make them easy targets for spacecraft. As of April 2024, five near-Earth comets and six near-Earth asteroids, one of them with a moon, have been visited by spacecraft. Samples of three have been returned to Earth, and one

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in 1908) at 1,300 years, for asteroids 1 km (0.62 mi) across at 440 thousand years, and for asteroids 5 km (3.1 mi) across at 18 million years. Some other models estimate similar impact frequencies, while others calculate higher frequencies. For Tunguska-sized (10 megaton)

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to catalog at least 90% of NEOs that are at least 1 kilometre (0.62 mi) in diameter, sufficient to cause a global catastrophe, was met by 2011. In later years, the survey effort was expanded to include smaller objects which have the potential for large-scale, though not global, damage.

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required to send a spacecraft on a mission to physically explore an NEO – and thus the amount of rocket fuel required for the mission – is lower than what is necessary for even lunar missions, due to their combination of low velocity with respect to Earth and weak gravity. They may present

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Some authors define Atens differently: they define it as being all the asteroids with a semi-major axis of less than 1 AU. That is, they consider the Atiras to be part of the Atens. Historically, until 1998, there were no known or suspected Atiras, so the distinction wasn't necessary.

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that have lost their volatile surface materials, although having a faint or intermittent comet-like tail does not necessarily result in a classification as a near-Earth comet, making the boundaries somewhat fuzzy. The rest of the near-Earth asteroids are driven out of the asteroid belt by

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Earth-based astronomy requires dark skies and hence nighttime observations, and even space-based telescopes avoid looking into directions close to the Sun, thus most NEO surveys are blind towards objects passing Earth on the side of the Sun. This bias is further enhanced by the effect of

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was observed above Czechoslovakia and Poland, moving at 41.74 km/s (25.94 mi/s) along a 409 km (254 mi) trajectory from south to north. The closest approach to the Earth was 98.67 km (61.31 mi) above the surface. It was captured by two all-sky cameras of the

2518:. It was recognised that due to the low surface gravity of all NEAs, moving around on the surface of an NEA would cost very little energy, and thus space probes could gather multiple samples. Overall, it was estimated that about one percent of all NEAs might provide opportunities for 1077:

of this ratio. Thus, a Palermo scale rating can be any positive or negative real number, and risks of any concern are indicated by values above zero. Unlike the Torino scale, the Palermo scale is not sensitive to newly discovered small objects with an orbit known with low confidence.

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15 days before impact. The impact shortened the orbital period of Dimorphos around Didymos by 33 minutes, indicating that the moon's momentum change was 3.6 times the momentum of the impacting spacecraft, thus most of the change was due to the ejected material of the moon itself.

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considered a threat because it was lost after its discovery; thus its orbit and potential for collision with Earth were not known precisely. Hermes, having a period of 2.13 years, was only re-discovered in 2003, and it is now known to be no threat for at least the next century.

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on November 14, 2020. The 5–11 m (16–36 ft) NEA was detected receding from Earth; calculations showed that on the day before, it had a close approach at about 6,750 km (4,190 mi) from the Earth's centre, or about 380 km (240 mi) above its surface.

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If a near-Earth object is near the part of its orbit closest to Earth's at the same time Earth is at the part of its orbit closest to the near-Earth object's orbit, the object has a close approach, or, if the orbits intersect, could even impact the Earth or its atmosphere.

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Some small asteroids that enter the upper atmosphere of Earth at a shallow angle remain intact and leave the atmosphere again, continuing on a solar orbit. During the passage through the atmosphere, due to the burning of its surface, such an object can be observed as an

2026:: The region of stability around L4 and L5 also includes orbits for co-orbital asteroids that run around both L4 and L5. Relative to the Earth and Sun, the orbit can resemble the circumference of a horseshoe, or may consist of annual loops that wander back and forth ( 2077:, was observed during its transition from a quasi-satellite orbit to a horseshoe orbit in 2006; it is expected to transfer back to a quasi-satellite orbit sometime around year 2066. A quasi-satellite discovered in 2023 but then found in old photographs back to 2012, 1489:

As of March 30, 2024 and according to statistics maintained by CNEOS, 34,725 NEOs have been discovered. Only 122 (0.35%) of them are comets, whilst 34,603 (99.65%) are asteroids. 2,406 of those NEOs are classified as potentially hazardous asteroids (PHAs).

1361:, which will survey the southern sky for transient events from 2025, is expected to increase the number of known asteroids by a factor of 10 to 100 and increase the ratio of known NEOs with diameters of 140 m (460 ft) or greater to at least 60%, while the 1621:

with the Sun, a planet, or other celestial body. With orbital lifetimes short compared to the age of the Solar System, new asteroids must be constantly moved into near-Earth orbits to explain the observed asteroids. The accepted origin of these asteroids is that

6736:"Threats From Space: a Review of U.S. Government Efforts to Track and mitigate Asteroids and Meteors (Part I and Part II) – Hearing Before the Committee on Science, Space, and Technology House of Representatives One Hundred Thirteenth Congress First Session" 587:

As astronomers became able to discover ever smaller and fainter and ever more numerous near-Earth objects, they began to routinely observe and catalogue close approaches. As of April 2024, the closest approach without impact ever detected, other than

850: 2502:, in March 1971. At that point, launching a spacecraft to asteroids was considered premature; the workshop only inspired the first astronomical survey specifically aiming for NEAs. Missions to asteroids were considered again during a workshop at the 2338:. The object was on a temporary satellite orbit around Earth, leaving for a solar orbit in June 2003. Calculations showed that it was also on a solar orbit before 2002, but was close to Earth in 1971. J002E3 was identified as the third stage of the 869:

that was observed on September 11, 2013, lasted 8 seconds, was likely caused by an object 0.6–1.4 m (2.0–4.6 ft) in diameter, and created a new crater 40 m (130 ft) across, was the largest ever observed as of July 2019.

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of 15 February 2013. A previously unknown 20 m (66 ft) asteroid exploded above this Russian city with an equivalent blast yield of 400–500 kilotons. The calculated orbit of the pre-impact asteroid is similar to that of Apollo asteroid

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interesting scientific opportunities both for direct geochemical and astronomical investigation, and as potentially economical sources of extraterrestrial materials for human exploitation. This makes them an attractive target for exploration.

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satellite, to be launched in 2027, is expected to push the ratio to 76%. Given the rarity of impacts by objects this big mentioned above, there are probably no objects of 140 metres or larger that will hit the earth in the next few centuries.

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As of May 2019, only 23 comets have been observed to pass within 0.1 AU (15,000,000 km; 9,300,000 mi) of Earth, including 10 which are or have been short-period comets. Two of these near-Earth comets, Halley's Comet and

919:. Through history, humans have associated NEOs with changing risks, based on religious, philosophical or scientific views, as well as humanity's technological or economical capability to deal with such risks. Thus, NEOs have been seen as 845:. 10.7 kg of meteorites were recovered after the impact. As of September 2024, nine impacts have been predicted, all of them small bodies that produced meteor explosions, with some impacts in remote areas only detected by the 2741:

From the 2000s, there were plans for the commercial exploitation of near-Earth asteroids, either through the use of robots or even by sending private commercial astronauts to act as space miners, but few of these plans were pursued.

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In 2000, NASA reduced from 1,000–2,000 to 500–1,000 its estimate of the number of existing near-Earth asteroids over one kilometer in diameter, or more exactly brighter than an absolute magnitude of 17.75. Shortly thereafter, the

6486:"Statement on The Threat of Impact by Near-Earth Asteroids before the Subcommittee on Space and Aeronautics of the Committee on Science of the U.S. House of Representatives at its hearings on "Asteroids: Perils and Opportunities"" 1250:

students launched Project Icarus, devising a plan to deflect the asteroid with rockets in case it was found to be on a collision course with Earth. Project Icarus received wide media coverage, and inspired the 1979 disaster movie

1451:(MPC) for cataloging. The MPC maintains separate lists of confirmed NEOs and potential NEOs. The MPC maintains a separate list for the potentially hazardous asteroids (PHAs). NEOs are also catalogued by two separate units of the 1094:. All or nearly all of the objects are highly likely to drop off the list eventually as more observations come in, reducing the uncertainties and enabling more accurate orbital predictions. A similar table is maintained on 2389:

In some cases, active space probes on solar orbits have been observed by NEO surveys and erroneously catalogued as asteroids before identification. During its 2007 flyby of Earth on its route to a comet, ESA's space probe

1678:, one of the largest PHAs with a diameter of 4.5 km (2.8 mi), has two moons measuring 100–300 m (330–980 ft) across, which were discovered by radar imaging during the asteroid's 2017 approach to Earth. 502:. The 33-year period of the Leonids led astronomers to suspect that they originate from a comet that would today be classified as an NEO, which was confirmed in 1867, when astronomers found that the newly discovered comet 1459:: the Center for Near Earth Object Studies (CNEOS) and the Solar System Dynamics Group. CNEOS's catalog of near-Earth objects includes the approach distances of asteroids and comets. NEOs are also catalogued by a unit of 513:

in 1898. The asteroid was subject to several extensive observation campaigns, primarily because measurements of its orbit enabled a precise determination of the then imperfectly known distance of the Earth from the Sun.

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Scientists have recognised the threat of impacts that create craters much bigger than the impacting bodies and have indirect effects on an even wider area since the 1980s, with mounting evidence for the theory that the

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on July 1, 1770. After an orbit change due to a close approach of Jupiter in 1779, this object is no longer an NEC. The closest approach ever observed for a current short-period NEC is 0.0229 AU (8.92 LD) for

266:, AU). This definition applies to the object's orbit around the Sun, rather than its current position, thus an object with such an orbit is considered an NEO even at times when it is far from making a close approach of 1501:

website. All but 95 of these NEAs are less than 50 meters in diameter and none of the listed objects are placed even in the "green zone" (Torino Scale 1), meaning that none warrant the attention of the general public.

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project, by contrast, aims to find impacting asteroids shortly before impact, much too late for deflection maneuvers but still in time to evacuate and otherwise prepare the affected Earth region. Another project, the

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to the Moon. In 2006, two more apparent temporary satellites were discovered which were suspected of being artificial. One of them was eventually confirmed as an asteroid and classified as the temporary satellite

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very close to the direction opposite of the Sun. Different surfaces display different levels of phase darkening, and research showed that, on top of albedo bias, this favours the discovery of silicon-rich

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and NEOWISE missions, has been the subject of a dispute between experts, with the 2018 publication of two independent analyses, one criticising and another giving results consistent with the WISE method.

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The potential of catastrophic impacts by near-Earth comets was recognised as soon as the first orbit calculations provided an understanding of their orbits: in 1694, Edmond Halley presented a theory that

578:. This was the first close approach predicted years in advance, since Icarus had been discovered in 1949. The first near-Earth asteroid known to have passed Earth closer than the distance of the Moon was 584:, a 5–10 m (16–33 ft) body which passed at a distance of 170,000 km (110,000 mi). By the 2010s, each year, several mostly small NEOs pass Earth closer than the distance of the Moon. 8332: 1555:, for example. As a result of these observational biases, in Earth-based surveys, NEOs tended to be discovered when they were in opposition, that is, opposite from the Sun when viewed from the Earth. 1425:, also requires orders of magnitude less energy. For a given amount of energy, a greater effect on the momentum of the object can be had by causing some of it to be blasted off it, as was done in the 1715:

combination of reflected light and thermal infrared emission, using a thermal model of the asteroid to estimate both its diameter and its albedo. The reliability of this method, as applied by the

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had yet to gain their present fearsome reputation … most astronomers and planetary scientists who made a career of studying asteroids rightfully saw them as sources of fascination, not of worry.

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have orbits strictly outside Earth's orbit: an Amor asteroid's perihelion distance (q) is greater than Earth's aphelion distance (1.017 AU). Amor asteroids are also near-earth objects so

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was listed with the highest chance of impacting Earth, at 1 in 22 on September 5, 2095. At only 7 m (23 ft) across, the asteroid however is much too small to be considered a

1073:, established in 2002, compares the likelihood of an impact at a certain date to the probable number of impacts of a similar energy or greater until the possible impact, and takes the 761: 9286:

Xu, Rui; Cui, Pingyuan; Qiao, Dong & Luan, Enjie (March 18, 2007). "Design and optimization of trajectory to Near-Earth asteroid for sample return mission using gravity assists".

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passed Earth at a distance of 0.042 AU (6,300,000 km), or 16 times the distance of the Moon. During this approach, Icarus became the first minor planet to be observed using

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probe orbited it from February 2000, landing on the surface of the 17 km (11 mi) asteroid in February 2001. A second NEA, the 535 m (1,755 ft) long peanut-shaped

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missions, or no more than about ten NEAs known at the time. A five-fold increase in the NEA discovery rate was deemed necessary to make a crewed mission within ten years worthwhile.

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Near-Earth asteroids also include the co-orbitals of Venus. As of January 2023, all known co-orbitals of Venus have orbits with high eccentricity, also crossing Earth's orbit.

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DR. A'HEARN: No. If we had spacecraft plans on the books already, that would take a year ... I mean a typical small mission ... takes four years from approval to start to launch ...

3413: 968:(1989 FC) missed the Earth by 700,000 km (430,000 mi). If the asteroid had impacted it would have created the largest explosion in recorded history, equivalent to 20,000 5620: 650: 371: 9603: 5716: 1859:, which implies that the asteroid's semi-major axis is also less than 0.983 AU. This group includes asteroids on orbits that never get close to Earth, including the sub-group of 7710: 2225:

as a class of solid interplanetary objects distinct from asteroids by their considerably smaller size. This definition was useful at the time because, with the exception of the

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Rubio, Luis R. Bellot; Ortiz, Jose L.; Sada, Pedro V. (2000). "Observation and Interpretation of Meteoroid Impact Flashes on the Moon". In Jenniskens, P.; et al. (eds.).

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2018, and the first prospecting satellite for the second phase was planned for a 2020 launch prior to the company closing and its assets purchased by ConsenSys Space in 2018.

9633: 2506:

held by NASA's Office of Space Science in January 1978. Of all of the near-Earth asteroids (NEA) that had been discovered by mid-1977, it was estimated that spacecraft could

2372:

is no longer listed as an asteroid by the Minor Planet Center. In September 2020, an object detected on an orbit very similar to that of the Earth was temporarily designated

559:

and confirmed short-period NEC observed only during its close approaches to the Sun, passed Earth undetected at a distance of 0.0120 AU (4.65 LD) on June 12, 1999.

13403: 12977: 3590: 2292:

fit the criteria for being a Near-Earth comet. In that year it passed by the earth at a distance of 5 million kilometres. This caused a change in its orbit so that now its

3335: 1706:, the diameter of the vast majority of near-Earth asteroids has only been estimated on the basis of their brightness and a representative asteroid surface reflectivity or 7571:

Rabinowitz, David; Helin, Eleanor; Lawrence, Kenneth & Pravdo, Steven (January 13, 2000). "A reduced estimate of the number of kilometer-sized near-Earth asteroids".

13373: 7965: 6778: 9418: 9238: 13174: 9060: 3264: 1967:

several degrees relative to that of the Earth. NEAs which have orbits that do resemble the Earth's in eccentricity, inclination and semi-major axis are grouped as

3976:

Waszczak, Adam; Prince, Thomas A.; et al. (2017). "Small Near-Earth Asteroids in the Palomar Transient Factory Survey: A Real-Time Streak-detection System".

1010:

popularised the notion that near-Earth objects could cause catastrophic impacts. Also at that time, a scare arose about a supposed 2003 impact of a planet called

7382:

Lupishko, D.F.; di Martino & Lupishko, T.A. (September 2000). "What the physical properties of near-Earth asteroids tell us about sources of their origin?".

3978: 3951: 1940:

Atiras and Amors do not cross the Earth's orbit and are not immediate impact threats, but their orbits may change to become Earth-crossing orbits in the future.

1033:. The scale in metres is the approximate diameter of an asteroid with a typical collision velocity. The x-axis is probability of an impact in the next 100 years. 768: 9133: 298:

local environment and human populations. Larger asteroids penetrate the atmosphere to the surface of the Earth, producing craters if they impact a continent or

10484: 2444: 1642:, where these resonances occur as the asteroids in these resonances have been moved onto other orbits. New asteroids migrate into these resonances, due to the 8320: 5457: 2262:

Comets are commonly divided between short-period and long-period comets. Short-period comets, with an orbital period of less than 200 years, originate in the

5779:. International Workshop on Collaboration and Coordination among NEO Observers and Orbital Computers. Kurshiki City Art Museum, Japan: IAU. pp. 97–102. 1979:

at a ratio of 1:1. All co-orbital asteroids have special orbits that are relatively stable and, paradoxically, can prevent them from getting close to Earth:

826:

On October 7, 2008, 20 hours after it was first observed and 11 hours after its trajectory has been calculated and announced, 4 m (13 ft) asteroid

9387: 6600: 1855:

have orbits strictly inside Earth's orbit: an Atira asteroid's aphelion distance (Q) is smaller than Earth's perihelion distance (0.983 AU). That is,

6006: 11620: 7738: 2607:

was redirected towards 99942 Apophis, which it is planned to orbit from April 2029. After completing its exploration of 162173 Ryugu, the mission of the

2061:

direction in one year, even though it is not bound gravitationally. As of October 2023, six asteroids were known to be a quasi-satellite of Earth.

1022:

There are two schemes for the scientific classification of impact hazards from NEOs, as a way to communicate the risk of impacts to the general public.

860:

Observed impacts aren't restricted to the surface and atmosphere of Earth. Dust-sized NEOs have impacted man-made spacecraft, including the space probe

6742: 4425:

Pettengill, G. H.; Shapiro, I. I.; Ash, M. E.; Ingalls, R. P.; Rainville, L. P.; Smith, W. B.; et al. (May 1969). "Radar observations of Icarus".

4143: 1062:

ratings of 5 to 7 are meant for impacts of increasing magnitude which are not certain but warrant public concern and governmental contingency planning,

846: 3229: 1518: 10517: 7866: 3556: 3117:

Rumpf, Clemens M.; Lewis, Hugh G.; Atkinson, Peter M. (March 23, 2017). "Asteroid impact effects and their immediate hazards for human populations".

1813:, with an absolute magnitude of 9.26 and directly measured irregular dimensions which are equivalent to a diameter of about 38 km (24 mi). 1373:(PDCO) to track NEOs larger than about 30–50 m (98–164 ft) in diameter and coordinate an effective threat response and mitigation effort. 5112: 13410: 9769: 8016: 4955:"Earth Impact Effects Program: A Web-based computer program for calculating the regional environmental consequences of a meteoroid impact on Earth" 3624: 3491: 3296: 1346: 1297: 9348: 3371: 429:

of 22.0 or brighter (a rough indicator of large size) are considered PHAs. Objects that either cannot approach closer to the Earth than 0.05

3764: 2701:

against near-Earth objects. In addition to telescopes on or in orbit around the Earth, the impact was observed by the Italian mini-spacecraft or

1610:(NEAs) are known, 2,406 of which are both sufficiently large and may come sufficiently close to Earth to be classified as potentially hazardous. 1052:. It rates the risks of impacts in the next 100 years according to impact energy and impact probability, using integer numbers between 0 and 10: 4104: 1264:. The link to impact hazard, the need for dedicated survey telescopes and options to head off an eventual impact were first discussed at a 1981 10633: 9203: 8918: 4542: 3517: 1578:

it was estimated that there are approximately 900 near-Earth asteroids of at least kilometer size, or technically and more accurately, with an

1415: 1932:. (This implies that the asteroid's semi-major axis (a) is also larger than 1.017 AU.) Some Amor asteroid orbits cross the orbit of Mars. 12962: 11401: 7549: 3923:

Morbidelli, Alessandro; Bottke, William F. Jr.; Froeschlé, Christiane; Michel, Patrick (January 2002). W. F. Bottke Jr.; et al. (eds.).

3820: 2358:, was confirmed as an artificial object, but its identity is unknown. Another temporary satellite was discovered in 2013, and was designated 1403: 1288:

gave NASA a mandate to detect 90% of near-earth asteroids over 1 km (0.62 mi) diameter (that threaten global devastation) by 2008.

857:

remains in its infancy and successfully predicted asteroid impacts are rare. The vast majority of impacts recorded by IMS are not predicted.

479:

in 1577 and the lower limit he obtained was well above the Earth diameter; the periodicity of some comets was first recognised in 1705, when

8420: 5740: 4171: 3692: 2834: 7063: 5050: 3403: 1809:

with an absolute magnitude of 33.58, corresponding to an estimated diameter of about 0.7 m (2.3 ft). The largest such object is

13107: 11416: 11124: 10993: 6617: 5135: 3095: 1326: 1059:

ratings of 2 to 4 are used for events with increasing magnitude of concern to astronomers trying to make more precise orbit calculations,

713: 471:

The first near-Earth objects to be observed by humans were comets. Their extraterrestrial nature was recognised and confirmed only after

9656: 8701: 5706: 5610: 11235: 10998: 10724: 10532: 9946: 9914: 9593: 1763:. The estimated number of near-Earth asteroids brighter than absolute magnitude of 22.0 (approximately over 140 m across) rose to 1090:

maintains an automated system to evaluate the threat from known NEOs over the next 100 years, which generates the continuously updated

841:

in Sudan. It was the first time that an asteroid was observed and its impact was predicted prior to its entry into the atmosphere as a

690: 532: 11928: 7700: 7203: 6544:

Mainzer, A.; Grav, T.; Bauer, J.; et al. (December 20, 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results".

4296:"Origin of the Marsden and Kracht Groups of Sunskirting Comets. I. Association with Comet 96P/Machholz and Its Interplanetary Complex" 12873: 6453: 6293: 5937: 5651: 1334: 957: 743: 5296: 5077: 433:(7,500,000 km; 4,600,000 mi), or which are fainter than H = 22.0 (about 140 m (460 ft) in diameter with assumed 11436: 9983: 9961: 3730: 1574:; and objects that move slower when encountering the Earth, which makes the detection of NEAs with low eccentricities more likely. 1124:

will pass the Earth at a safe closest distance (perigee) of 0.00425 AU (636,000 km; 395,000 mi) on August 31, 2080.

5873: 4718: 3582: 11613: 9735: 5812: 4381: 1272:. Plans for a more comprehensive survey, named the Spaceguard Survey, were developed by NASA from 1992, under a mandate from the 1261: 657: 270:. If an NEO's orbit crosses the Earth's orbit, and the object is larger than 140 meters (460 ft) across, it is considered a 6323: 13028: 12673: 12658: 12638: 11950: 11897: 10138: 10123: 10046: 5540: 3325: 2553:

mission, which succeeded in taking material samples back to Earth. A third NEA, the 2.26 km (1.40 mi) long elongated

1376:

Survey programs aim to identify threats years in advance, giving humanity time to prepare a space mission to avert the threat.

1357:

2023, the ratio of discovered NEOs with diameters of 140 m (460 ft) or greater was estimated at 38%. The Chile-based

11946: 11931: 1674:). As of April 2024, 97 NEAs were known to have at least one moon, including three known to have two moons. The asteroid 12972: 12705: 12668: 12663: 11940: 11527: 11522: 11248: 10188: 10133: 10128: 8268: 6768: 5504: 4377: 4137: 1447:

When an NEO is detected, like all other small Solar System bodies, its positions and brightness are submitted to the (IAU's)

1370: 1247: 1070: 314: 6967: 6842: 6811: 6037: 2897:

landed on its surface in November 2014. After the end of its mission, Rosetta was crashed into the comet's surface in 2016.

1566:

Further observational biases favour objects that have more frequent encounters with the Earth, which makes the detection of

1515:

need to be compensated when trying to calculate the number of bodies in a population from the list of its detected members.

13398: 13335: 12989: 12710: 12648: 12643: 11939: 11587: 11456: 11411: 11240: 10083: 10051: 9941: 9538: 9441: 9410: 9230: 8945: 2769:) in December 2024, with the goal of performing a flyby of an as yet undisclosed asteroid to confirm if it is a metal-rich 1943:

As of March 30, 2024, 33 Atiras, 2,744 Atens, 19,613 Apollos and 12,213 Amors have been discovered and cataloged.

1314: 626:, relatively large at about 400 m (1,300 ft) in diameter, passed within 324,930 km (201,900 mi) (0.845 542:, have been observed during multiple close approaches. The closest observed approach was 0.0151 AU (5.88 LD) for 17: 11937: 11934: 11930: 11926: 7440: 4756: 3202: 2323:

can end up in near-Earth orbits around the Sun, and be re-discovered by NEO surveys when they return to Earth's vicinity.

746:, approximately 15 kilotonnes of TNT) at five years, for asteroids 60 m (200 ft) across (an impact energy of 10 13552: 12653: 11476: 10093: 9886: 9475: 9056: 8450: 6388: 4788: 3662: 3051: 2558: 2293: 1716: 422: 163: 11944: 11936: 6519: 3260: 1747:(of which 93% had been discovered at the time), while the number of NEAs larger than 140 meters across was estimated at 1041:

was established at an IAU workshop in Torino in June 1999, in the wake of the public confusion about the impact risk of

726:

and only small amounts of meteorites arriving to the Earth surface, while larger objects hit the water surface, forming

11933: 11606: 10626: 10208: 9083: 7922: 4962: 11951: 11947: 11507: 10319: 7674: 1411:(ZTF), which surveys for objects that change their brightness rapidly, also detects asteroids passing close to Earth. 1276:. To promote the survey on an international level, the International Astronomical Union (IAU) organised a workshop at 807: 12801: 12774: 11942: 11737: 11582: 10537: 10145: 9123: 9048: 8914: 6410: 6171:

Farnocchia, Davide; Chesley, Steven R. (2013). "Assessment of the 2880 impact threat from asteroid (29075) 1950 DA".

9155: 8473: 7923:"The discovery and characterization of (594913) 'Ayló'chaxnim, a kilometre sized asteroid inside the orbit of Venus" 4564:

Scotti, J. V.; Rabinowitz, D. L.; Marsden, B. G. (November 28, 1991). "Near miss of the Earth by a small asteroid".

3924: 979:. The awareness of the wider public of the impact risk rose after the observation of the impact of the fragments of 13189: 11952: 11300: 11030: 10740: 9325: 9177: 5453: 5378: 3858: 2937: 2683: 2666: 1427: 379: 5347: 4656: 1771:, double the WISE estimate, of which about a fourth were known at the time. The number of asteroids brighter than 302:

if they impact the sea. Interest in NEOs has increased since the 1980s because of greater awareness of this risk.

11117: 9564: 9379: 7515: 6319: 5159: 2942: 2809: 1338: 861: 738:

steady for the past 3.5 billion years, which requires a steady replenishment of the NEO population from the

12717: 5914: 4348: 2034:, which travels along bean-shaped annual loops and completes its horseshoe libration cycle every 770–780 years. 13368: 12784: 12618: 11669: 10563: 8972:

Study to Determine the Feasibility of Extending the Search for Near-Earth Objects to Smaller Limiting Diameters

8643:"On the co-orbital asteroids in the solar system: medium-term timescale analysis of the quasi-coplanar objects" 8192: 7181: 6932: 6059: 5994: 5407:

Rubin, Alan E.; Grossman, Jeffrey N. (January 2010). "Meteorite and meteoroid: New comprehensive definitions".

4683: 1711: 1579: 1190: 426: 8737:"Astronomers have discovered an asteroid that orbits the Sun with Earth, earning it the moniker "quasi-moon."" 8169: 7787: 7202:

Bottke, William F. Jr.; Nolan, Michale C.; Melosh, H. Jay; Vickery, Ann M.; Greenberg, Richard (August 1996).

12893: 12789: 11828: 10778: 10619: 10499: 9909: 9490: 8736: 6643: 2888: 2790: 2428: 1606:

These are asteroids in a near-Earth orbit without the tail or coma of a comet. As of March 2024, 34,603

1257:, in which the US and the USSR join forces to blow up an Earth-bound fragment of an asteroid hit by a comet. 1056:

ratings of 0 and 1 are of little concern, with a probability less than 1% of an impact in the next 100 years,

330:

successful deflection test was conducted. Similar missions are in progress. Preliminary plans for commercial

13306: 8355: 6735: 4633: 1739:. In 2011, on the basis of NEOWISE observations, the estimated number of one-kilometer NEAs was narrowed to 718:

When a near-Earth object impacts Earth, objects up to a few tens of metres across ordinarily explode in the

13393: 12948: 12928: 12823: 11497: 11421: 11197: 11091: 10718: 10694: 10688: 9931: 8103: 8043: 6806: 4811: 4403: 3233: 3119: 1322: 892: 679: 539: 418: 417:

The orbits of some NEOs intersect that of the Earth, so they pose a collision danger. These are considered

347: 271: 13311: 11949: 9471:

Hayabusa2#'s Exploration to Asteroids 2001 CC21 and 1998 KY26 Provides Key Insights Into Planetary Defense

7489:"Asteroid Institute Uses Revolutionary Cloud-Based Astrodynamics Platform to Discover and Track Asteroids" 3548: 3450: 1522:

Artist's impression of an asteroid that orbits closer to the Sun than Earth's orbit, showing its dark side

1014:

with Earth, which persisted on the internet as the predicted impact date was moved to 2012 and then 2017.

73: 13689: 13468: 12994: 12923: 12888: 11927: 11921: 11654: 10509: 10177: 6888: 4816: 4295: 2209:

showed repeated transitions into temporary satellite orbits both in the past and the future 10,000 years.

1955:

The five Lagrangian points relative to the Sun and Earth and possible orbits along gravitational contours

776:

The second-largest observed event after the Tunguska meteor was a 1.1 megaton air blast in 1963 near the

12908: 10568: 9993: 9761: 8020: 5104: 3616: 3481: 3361: 3289: 1783:—of which about 1.3 percent had been discovered by February 2016; the number of asteroids brighter than 1291: 13694: 13618: 13383: 13184: 13067: 13050: 13016: 11948: 11890: 11818: 11808: 11466: 11441: 11110: 11046: 10959: 10773: 10745: 9856: 9839: 7622:

Stuart, J. S. (November 23, 2001). "A Near-Earth Asteroid Population Estimate from the LINEAR Survey".

4045: 1860: 1613:

NEAs survive in their orbits for just a few million years. They are eventually eliminated by planetary

1494: 1478:

depending on size, composition, and orbit. Those which are asteroids can additionally be members of an

1422: 1387: 1342: 980: 896: 878: 854: 6108:"Asteroid 1950 DA's Encounter with Earth in 2880: Physical Limits of Collision Probability Prediction" 3756: 13226: 13201: 13011: 11813: 11517: 11342: 11213: 11133: 11051: 10977: 10971: 10965: 10767: 9978: 9926: 9797: 6546: 5033: 4098: 3790: 2917: 2698: 1452: 1408: 1358: 1281: 1203: 975:

From the 1990s, a typical frame of reference in searches for NEOs has been the scientific concept of

865: 695: 303: 11945: 8906: 7314: 7292:

Morbidelli, A.; Vokrouhlický, D. (May 2003). "The Yarkovsky-driven origin of near-Earth asteroids".

4954: 4532: 2785: 1638:

the asteroid's orbit and it comes into the inner Solar System. The asteroid belt has gaps, known as

983:

into Jupiter in July 1994. In March 1998, early orbit calculations for recently discovered asteroid

686:

from the U.S. Southwest to Canada. It passed within 58 km (36 mi) of the Earth's surface.

13517: 13122: 11649: 11461: 11279: 10953: 10762: 10446: 8170:"A trio of horseshoes: Past, present, and future dynamical evolution of Earth co-orbital asteroids 7107: 4216:; Schmadel, Lutz D. (2002). "Discovery Circumstances of the First Near-Earth Asteroid (433) Eros". 4213: 2872: 2860: 2804: 1972: 1703: 1635: 1614: 109: 10216: 9825: 8102:

de la Fuente Marcos, R.; de la Fuente Marcos, C.; et al. (January 2024).

7541: 6864: 6690: 1380:

REP. STEWART: ... are we technologically capable of launching something that could intercept ? ...

755:

impacts, the estimates range from one event every 2,000–3,000 years to one event every 300 years.

13206: 13033: 12680: 12584: 12497: 12197: 12047: 11938: 11929: 11833: 11717: 11629: 11218: 11018: 10327: 10199: 10001: 9879: 9626:"Planetary Resources Launches Latest Spacecraft in Advance of Space Resource Exploration Mission" 8611: 8381: 8261:"Lunar ejecta origin of near-Earth asteroid Kamo'oalewa is compatible with rare orbital pathways" 7462: 7337:

Lupishko, D.F. & Lupishko, T.A. (May 2001). "On the Origins of Earth-Approaching Asteroids".

6963: 5322: 4272: 1648: 933: 383: 251: 131: 64: 8816: 13699: 13211: 13149: 13097: 13087: 13072: 13023: 12883: 12813: 12235: 11923: 11754: 11577: 11157: 11061: 10803: 10706: 7309: 5028: 2922: 2432: 2379: 2099: 1395: 1285: 1273: 1006: 972:. It attracted widespread attention because it was discovered only after the closest approach. 672: 13132: 11943: 11935: 11932: 7102: 4127: 13684: 13577: 13504: 13378: 13231: 13194: 13082: 13077: 11883: 11659: 11381: 11025: 10936: 10818: 10813: 10795: 10522: 9936: 8713: 7339: 6107: 2549: 2511: 2503: 2462: 1460: 1099: 947:

of near-Earth asteroids as benign objects of fascination or killer objects with high risk to

777: 548: 503: 13246: 8215: 8136: 6901: 5847: 5420: 5282: 4975: 4867: 4829: 3064: 2410:

was similarly removed from asteroid catalogues when the observed object was identified with

2378:. However, orbital calculations and spectral observations confirmed that the object was the 2062: 1698:

While the size of a very small fraction of these asteroids is known to better than 1%, from

995:

collision. By that time, inaccurate reports of a potential impact had caused a media storm.

13139: 13092: 12749: 12207: 12172: 12167: 12061: 12012: 11985: 11941: 11920: 11727: 11502: 11365: 11295: 10860: 10823: 10558: 10118: 9295: 9029: 9002: 8877: 8787: 8667: 8574: 8498: 8396: 8287: 8211: 8132: 7885: 7763: 7631: 7580: 7409: 7391: 7348: 7301: 7218: 7116: 7025: 6897: 6773: 6766: 6662: 6565: 6418: 6190: 6122: 5843: 5780: 5484: 5416: 5278: 5219: 5168: 5042: 4971: 4912: 4863: 4825: 4575: 4481: 4436: 4307: 4225: 4180: 4009: 3997: 3935: 3138: 3060: 2795: 2718: 2392: 2045:

is an asteroid on a relatively stable circumference-of-a-horseshoe orbit, with a horseshoe

1960: 1590: 1353: 1306: 86: 11924: 11922: 10169: 9762:"Space mining startup AstroForge aims to launch historic asteroid-landing mission in 2025" 8544:

de la Fuente Marcos, C.; de la Fuente Marcos, R. (November 11, 2016).

8042:

Ribeiro, A. O.; Roig, F.; De Prá, M. N.; Carvano, J. M.; DeSouza, S. R. (March 17, 2016).

6459: 5741:"Nibiru: How the nonsense Planet X Armageddon and Nasa fake news theories spread globally" 5643: 5196:

de la Fuente Marcos, C.; de la Fuente Marcos, R. (September 1, 2014).

4075: 2365:

as a suspected asteroid. It was later found to be an artificial object of unknown origin.

2088:, was found to have an orbit that is stable for about 4,000 years, from 100 BC to AD 3700. 1260:

The first astronomical program dedicated to the discovery of near-Earth asteroids was the

8: 13591: 13480: 13318: 13291: 13241: 13045: 12509: 12202: 12054: 11406: 11372: 11285: 10712: 9712: 8866:"Threat from Within: Excitation of Venus's Co-orbital Asteroids to Earth-crossing Orbits" 8260: 5746: 5256: 5073: 2932: 2893: 2851: 2845: 2746: 2316: 2155: 1964: 1599: 1448: 1330: 660:

Diagram showing spacecraft and asteroids (past and future) between the Earth and the Moon

12405: 12284: 9299: 9260: 9033: 9006: 8881: 8791: 8671: 8578: 8502: 8400: 8291: 7889: 7767: 7635: 7584: 7395: 7352: 7305: 7222: 7120: 7029: 6666: 6569: 6194: 6126: 5784: 5488: 5223: 5172: 5155:"An estimate of the terrestrial influx of large meteoroids from infrasonic measurements" 5046: 4916: 4851: 4706: 4579: 4485: 4440: 4311: 4229: 4184: 4001: 3939: 3722: 3142: 3087: 853:, a network of infrasound sensors designed to detect the detonation of nuclear devices. 306:

by deflection is possible in principle, and methods of mitigation are being researched.

13656: 13644: 13571: 13441: 13388: 13266: 13236: 13144: 12957: 12094: 11925: 10790: 10600: 9872: 9657:"One year after Planetary Resource faded into history, space mining retails its appeal" 8777: 8657: 8592: 8564: 8516: 8488: 8412: 8356:"Earth has an extra companion, a Trojan asteroid that will hang around for 4,000 years" 8277: 8227: 8201: 8122: 7903: 7875: 7779: 7753: 7655: 7604: 7364: 7274: 6652: 6581: 6555: 6206: 6180: 6146: 5869: 5774: 5711: 5510: 5432: 5352: 5237: 5209: 4997: 4983: 4928: 4897: 4533:"How the Asteroid Story Hit: An Astronomer Reveals How a Discovery Spun Out of Control" 4505: 4323: 4243: 4021: 3987: 3486: 3162: 3128: 2277: 2036: 1984: 1905:

have a semi-major axis of more than 1 AU and cross Earth's orbit. Mathematically,

1886:

have a semi-major axis of less than 1 AU and cross Earth's orbit. Mathematically,

1512: 1391: 1269: 1166: 1107: 1000: 789: 739: 698:, which for the first time enabled geometric calculations of the orbit of such a body. 617: 342: 54: 12378: 12341: 8259:

Castro-Cisneros, Jose Daniel; Malhotra, Renu; Rosengren, Aaron J. (October 23, 2023).

7323: 6909: 6712: 6577: 5967: 5855: 5153:

Silber, Elizabeth A.; Revelle, Douglas O.; Brown, Peter G.; Edwards, Wayne N. (2009).

4373: 4192: 4166: 2580:

space probe, which returned a sample to Earth. A second sample-return mission, NASA's

899:

in September 2004 and currently has a minimum possible distance of 2.5 lunar distances

390:(AU; Sun–Earth distance) from the Sun. This definition excludes larger bodies such as 13431: 13001: 12943: 12623: 12549: 12490: 12219: 11664: 11272: 11228: 11172: 11066: 10854: 10833: 10676: 10670: 10527: 9956: 8970: 8612:"Earth's weird 'quasi-moon' Kamo'oalewa is a fragment blasted out of big moon crater" 8596: 8511: 8231: 8068: 7907: 7812: 7647: 7596: 7368: 7278: 7041: 6138: 5514: 5500: 5436: 5428: 5291: 5241: 4871: 4509: 4497: 4472: 4452: 4448: 4133: 4013: 3154: 2617: 2519: 2417: 2412: 2331:

orbit and surface characteristics, a new study found the artificial origin unlikely.

2320: 2289: 2241: 2058: 2009: 1998: 1976: 1671: 1667: 1627: 1265: 1091: 985: 593: 543: 484: 450: 430: 399: 387: 334:

have been drafted by private startup companies, but few of these plans were pursued.

263: 142: 12461: 9707: 8520: 7783: 7659: 7431:

Benner, Lance; Naidu, Shantanu; Brozovic, Marina; Chodas, Paul (September 1, 2017).

7016:

Bottke, W. F. Jr. (2000). "Understanding the Distribution of Near-Earth Asteroids".

6331: 6210: 5532: 5001: 4604: 4327: 4025: 3166: 3049:

Chapman, Clark R. (May 2004). "The hazard of near-Earth asteroid impacts on earth".

1421:

Deflection, which means a change in the object's orbit months to years prior to the

445: 13492: 13296: 13286: 13179: 13154: 12564: 12534: 12385: 12259: 12099: 11964: 11838: 11167: 11013: 10844: 10784: 10494: 9303: 9001:. Workshop on Dust in Planetary Systems (ESA SP-643). Vol. 643. pp. 3–6. 8885: 8795: 8675: 8582: 8506: 8416: 8404: 8295: 8219: 8168:

de la Fuente Marcos, C.; de la Fuente Marcos, R. (April 2016).

8140: 8058: 7937: 7893: 7771: 7701:"Good News Everyone! There are Fewer Deadly Undiscovered Asteroids than we Thought" 7639: 7608: 7588: 7356: 7319: 7264: 7226: 7124: 7033: 6905: 6670: 6573: 6198: 6150: 6130: 5851: 5492: 5424: 5286: 5227: 5176: 4987: 4979: 4932: 4920: 4583: 4566: 4537: 4528: 4489: 4444: 4427: 4315: 4188: 4005: 3943: 3549:"NEAR Mission Completes Main Task, Now Will Go Where No Spacecraft Has Gone Before" 3408: 3197: 3146: 3068: 3024: 2907: 2507: 2480: 1989: 1988:: Near the orbit of a planet, there are five gravitational equilibrium points, the 1872: 1643: 1559: 1543: 1011: 961: 556: 552: 487:. The 1758–1759 return of Halley's Comet was the first comet appearance predicted. 10160: 8144: 7463:"UW-developed, cloud-based astrodynamics platform to discover and track asteroids" 7037: 6585: 5683: 5584: 3884: 2661: 1971:. Within this group are NEAs that have the same orbital period as the Earth, or a 1775:, which corresponds to about 40 m (130 ft) in diameter, is estimated at 13363: 13261: 13169: 13060: 13038: 12835: 12779: 12769: 12559: 12539: 12514: 12502: 12456: 12444: 12348: 12331: 12291: 12269: 12264: 11759: 11702: 11687: 11543: 11492: 11223: 11008: 11003: 10489: 10456: 10451: 10441: 10436: 10415: 10410: 10386: 10381: 10376: 10371: 10366: 10361: 10356: 10337: 10332: 10307: 10302: 10297: 10292: 10287: 10282: 10277: 10263: 10258: 10253: 10248: 10243: 10236: 10231: 10226: 10221: 10182: 10110: 10073: 9968: 9951: 9806: 9204:"New Data Confirm 2020 SO to Be the Upper Centaur Rocket Booster From the 1960's" 8679: 7990: 7775: 6959: 6834: 6801: 6202: 6033: 5993:

Milani, Andrea; Valsecchi, Giovanni; Sansaturio, Maria Eugenia (March 12, 2002).

5496: 4493: 2770: 2750: 2612: 2499: 2237: 2053: 2022: 1968: 1901: 1830: 1571: 1552: 1548: 1539: 1479: 1142: 1133: 960:(in which the non-avian dinosaurs died out) 65 million years ago was caused by a 683: 499: 331: 193: 9682: 9594:"Planetary Resources' Arkyd-6 prototype imaging satellite has left the building" 8941: 7177: 3757:"NASA finally opens OSIRIS-REx asteroid sample canister after freeing stuck lid" 1963:

than that of the Earth and the other major planets and their orbital planes can

13668: 13347: 13127: 13117: 13055: 12918: 12845: 12806: 12727: 12700: 12554: 12424: 12395: 12373: 12363: 12353: 12306: 11774: 11742: 11707: 11336: 11290: 10700: 10682: 10664: 10476: 10078: 10031: 10021: 9919: 8842: 8299: 7705: 7432: 6271: 6248: 6225: 4741: 4661: 4167:"Observation and interpretation of the Leonid meteors over the last millennium" 3192: 3072: 2989: 2866:

In November 2010, after completing its primary mission to non-near-Earth comet

2535: 2472: 2450: 2252: 2226: 1864: 1847: 1655: 969: 965: 751: 627: 567: 465: 233: 171: 9847: 9830: 9469: 9307: 8446: 8223: 7834: 7360: 7269: 7252: 6511: 6380: 5808: 5323:"Tiny asteroid burns up over Philippines. 'Discovered this morning,' ESA says" 4778: 3652: 494:(shooting stars) was only recognised on the basis of the analysis of the 1833 406:; and artificial bodies orbiting the Sun. A small Solar System body can be an 159: 13678: 13446: 13426: 13006: 12739: 12722: 12543: 12466: 12429: 12400: 12390: 12358: 12336: 12316: 12279: 12252: 12247: 12242: 11798: 11697: 11692: 11561: 11309: 11177: 11071: 10100: 10068: 10063: 10026: 9973: 8072: 7942: 6767:

University of Hawaii at Manoa's Institute for Astronomy (February 18, 2013).

5562: 4875: 4456: 4017: 3522: 3158: 2689: 2645: 2554: 2540: 2031: 1920: 1882: 1675: 1623: 1595: 1567: 1526:

Bigger asteroids reflect more light, and the two biggest near-Earth objects,

1483: 1253: 1151: 948: 916: 888: 838: 731: 634: 480: 213: 203: 175: 11598: 11328: 9468:

Hirabayashi, Masatoshi; Yoshikawa, Makoto; et al. (February 15, 2023).

9091: 8800: 8765: 8587: 8545: 7898: 7857: 7643: 6485: 6226:"Near-Earth Asteroid 2004 MN4 Reaches Highest Score To Date On Hazard Scale" 6134: 5232: 5197: 3947: 1213: 13632: 13524: 13510: 13301: 13256: 12913: 12796: 12690: 12630: 12613: 12439: 12417: 12368: 12326: 12311: 12296: 12162: 12121: 12086: 11906: 11864: 11637: 11548: 11431: 11348: 11253: 11162: 10642: 10588: 10553: 10105: 10011: 8641:

Di Ruzza, Sara; Pousse, Alexandre; Alessi, Elisa Maria (January 15, 2023).

8063: 7651: 7600: 7230: 7103:"On the Relative Numbers of C Types and S Types among Near-Earth Asteroids" 7045: 6142: 5615: 4992: 4501: 3617:"Farewell, Ryugu! Japan's Hayabusa2 Probe Leaves Asteroid for Journey Home" 2912: 2877: 2818: 2587: 2571: 2563: 2485: 1951: 1810: 1795:

million—of which about 0.003 percent had been discovered by February 2016.

1639: 1618: 1531: 1362: 1038: 1030: 964:. On March 23, 1989, the 300 m (980 ft) diameter Apollo asteroid 907:

that any near-Earth object poses has been viewed having regard to both the

785: 707: 563: 310: 104: 9349:"Japanese spacecraft reaches asteroid after three-and-a-half-year journey" 8111:

with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope"

7516:"Asteroids and Adversaries: Challenging What NASA Knows About Space Rocks" 6423: 771:

Location and impact energy of small asteroids impacting Earth's atmosphere

456: 13565: 13559: 13342: 13330: 13325: 13276: 13251: 13221: 13216: 13164: 13159: 12984: 12898: 12857: 12818: 12695: 12526: 12449: 12412: 12301: 11854: 11803: 11764: 10150: 10016: 8890: 8865: 7856:

de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (August 1, 2019).

7152: 6675: 6638: 6354: 5181: 5154: 3854: 3330: 3150: 2263: 2256: 723: 571: 472: 9515: 9321: 9020:

Kresak, L'.l (1978). "The Tunguska object – A fragment of Comet Encke".

6960:"JPL Small-Body Database Search Engine. Constraints: asteroids and NEOs" 6272:"Possibility of an Earth Impact in 2029 Ruled Out for Asteroid 2004 MN4" 6084: 3693:"NASA's DART Mission Hits Asteroid in First-Ever Planetary Defense Test" 682:

was witnessed by many people and even filmed as it moved north over the

13584: 13531: 13271: 12850: 12434: 11823: 11769: 11512: 11471: 11451: 11446: 11354: 10611: 9736:"Asteroid mining startup AstroForge to launch first missions this year" 9380:"'Exactly Perfect'! NASA Hails Asteroid Sample-Return Mission's Launch" 8764:

de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (January 2018).

8321:"NASA's WISE mission finds first Trojan asteroid sharing Earth's orbit" 6294:"NASA Analysis: Earth Is Safe From Asteroid Apophis for 100-Plus Years" 5374: 5027:

Asher, D. J.; Bailey, M.; Emel'Yanenko, V.; Napier, W. (October 2005).

2952: 2758: 2582: 2490: 2421: 2383: 2271: 2167: 2068: 1443:

Cumulative discoveries of near-Earth asteroids known by size, 1980–2024

1318: 1310: 944: 925: 912: 781: 719: 483:

published his orbit calculations for the returning object now known as

386:

with orbits around the Sun that are at least partially closer than 1.3

318: 13663: 8763: 8543: 8167: 8101: 7855: 6989: 6601:"Inside the mission to stop killer asteroids from smashing into Earth" 5195: 27:

Small Solar System body with an orbit that can bring it close to Earth

13545: 13538: 12967: 12933: 12764: 12685: 12608: 12603: 12574: 12321: 12274: 12143: 12126: 11859: 11749: 11553: 11322: 11187: 11182: 11081: 11076: 10041: 10006: 9446: 9049:"What about the comet that's supposed to hit the Earth in 130 years?" 8380:

Wiegert, Paul A.; Innanen, Kimmo A.; Mikkola, Seppo (June 12, 1997).

7862:, a major step towards the future discovery of the Vatira population" 7739:"The near-Earth asteroid population from two decades of observations" 7592: 6886:

Marsden, B. G.; Williams, G. V. (1998). "The NEO Confirmation Page".

5910: 4924: 4587: 3657: 3366: 2947: 2694: 2670: 2639: 2628: 2592: 2576: 2343: 2222: 2079: 2046: 2027: 1868: 1467: 1180: 1074: 1043: 795: 570:. On June 14, 1968, the 1.4 km (0.87 mi) diameter asteroid 491: 294: 12569: 11102: 6928: 5198:"Reconstructing the Chelyabinsk event: Pre-impact orbital evolution" 4898:"Impacts on the Earth by asteroids and comets: Assessing the hazard" 3452:

Report of the Task Force on potentially hazardous Near Earth Objects

2757:

Another American company established with the goal of space mining,

2311:

discovery images taken on September 3, 2002. J002E3 is in the circle

1065:

8 to 10 would be used for certain collisions of increasing severity.

13598: 13436: 12903: 12759: 12744: 12485: 12192: 12040: 11679: 11315: 11147: 10909: 10898: 10887: 10876: 10865: 10750: 9895: 9598: 9539:"China to target asteroid 2019 VL5 for 2025 planetary defense test" 9442:"China conducts parachute tests for asteroid sample return mission" 8782: 8662: 8569: 8282: 8206: 8127: 7880: 7758: 7128: 6835:"First Discovery of a Small Near Earth Asteroid with ZTF (2018 CL)" 6657: 5105:"Russian fireball explosion shows meteor risk greater than thought" 4953:

Collins, Gareth S.; Melosh, H. Jay; Marcus, Robert A. (June 2005).

4319: 3992: 3133: 2927: 2867: 2839: 2724: 2650: 2526: 2467: 2339: 2281: 2200: 2189: 2178: 2105: 1527: 1471: 1224: 828: 813: 747: 602: 510: 476: 461: 407: 275: 46: 8493: 8408: 6560: 6185: 5214: 4470:

Goldstein, R. M. (November 1968). "Radar Observations of Icarus".

2403:, with an alert issued due to its close approach. The designation 2304: 1821: 1194:

1 in 10, still the highest, with a Palermo Scale rating of −2.98.

1127: 97: 12840: 12828: 12754: 12153: 12131: 12006: 11991: 11359: 10945: 10849: 10838: 10828: 10808: 5611:"Apocalypse postponed: how Earth survived Halley's comet in 1910" 5585:"MIDAS: Moon Impacts Detection and Analysis System. Main Results" 5026: 4783: 4629: 2702: 2374: 2355: 2327: 2267: 2161: 1993: 1660: 1631: 1352:

In 2005, the original USA Spaceguard mandate was extended by the

1277: 908: 727: 580: 495: 299: 81: 9467: 8258: 4740:

Chodas, Paul; Giorgini, Jon & Yeomans, Don (March 6, 2012).

3518:"Rosetta lands on 67P in grand finale to two year comet mission" 2525:

The first near-Earth asteroid to be visited by a spacecraft was

1300:

program, starting in December 2013, with green dots showing NEAs

780:

between South Africa and Antarctica, which was detected only by

13281: 12478: 12473: 12187: 12182: 12148: 12136: 12081: 12033: 12026: 12001: 11996: 11875: 11426: 11152: 11056: 9648: 6002: 5773:

Rickman, Hans (2001). Isobe, Syuzo; Asakuro, Yoshifusa (eds.).

3922: 3825: 3653:"OSIRIS-REx: A complete guide to the asteroid-sampling mission" 3404:"Earth-Approaching Asteroids as Targets for Exploration (1978)" 2829: 2823: 2586:

probe, targeted the 500 m (1,600 ft) Apollo asteroid

2335: 2308: 1725: 1707: 1095: 1025: 842: 589: 434: 391: 9491:"Japan's mission to bizarre asteroid Phaethon delayed to 2025" 7064:"Mathematicians Say Asteroid May Hit Earth in a Million Years" 4076:"List Of Potentially Hazardous Minor Planets (by designation)" 3723:"Hayabusa-2: Capsule with asteroid samples in 'perfect' shape" 1690: 788:. The third-largest, but by far best-observed impact, was the 12598: 12177: 12109: 12104: 12019: 11974: 11969: 11790: 10583: 9793: 7570: 5072:

Marcus, Robert; Melosh, H. Jay & Collins, Gareth (2010).

1838: 1834: 1699: 1647:

of asteroids from the asteroid belt, reflecting a variety of

1558:

The most practical way around many of these biases is to use

1475: 1439: 937: 575: 411: 395: 279: 267: 259: 223: 9864: 9813:

Catalogue of the Solar System Small Bodies Orbital Evolution

9812: 7858:"Understanding the evolution of Atira-class asteroid 2019 AQ 7204:"Origin of the Spacewatch Small Earth-Approaching Asteroids" 6106:

Giorgini, J. D.; Ostro, S. J.; et al. (April 5, 2002).

5707:"Big Asteroid Passes Near Earth Unseen In a Rare Close Call" 1996:. As of October 2023, Earth has two confirmed Trojans: 1829:

Near-Earth asteroids are divided into groups based on their

12230: 12114: 11979: 10930: 9801: 8709: 8328: 7966:"Astronomers Discover Asteroid that Flies Close to the Sun" 5090:(solution using 2600 kg/m^3, 17 km/s, 45 degrees) 4896:

Chapman, Clark R. & Morrison, David (January 6, 1994).

4424: 4374:"Radar observations of long-lost asteroid 1937 UB (Hermes)" 4132:. Cambridge: Cambridge University Press. pp. 101–103. 2674: 2637:

in July 2031. In 2025, JAXA plans to launch another probe,

2544: 2530: 2515: 1702:

observations, from images of the asteroid surface, or from

1498: 1456: 1087: 976: 920: 904: 883: 403: 322: 186:

34,000+ known NEOs, divided into several orbital subgroups

13627: 8843:"Tiny Object Discovered in Distant Orbit Around the Earth" 7930:

Monthly Notices of the Royal Astronomical Society: Letters

7381: 7011: 7009: 7007: 6769:"ATLAS: The Asteroid Terrestrial-impact Last Alert System" 6270:

Yeomans, D.; Chesley, S.; Chodas, P. (December 27, 2004).

6224:

Yeomans, D.; Chesley, S.; Chodas, P. (December 23, 2004).

5202:

Monthly Notices of the Royal Astronomical Society: Letters

3610: 3608: 3547:

Savage, Donald & Buckley, Michael (January 31, 2001).

2817:) passed through its coma. In March 1986, ICE, along with 2574:

was explored from June 2018 until November 2019 by JAXA's

2334:

In September 2002, astronomers found an object designated

1246:

A year before the 1968 close approach of asteroid Icarus,

1150:

On December 24, 2004, 370 m (1,210 ft) asteroid

633:

On February 15, 2013, the 30 m (98 ft) asteroid

350:(size over 140 m (460 ft) and passing within 7.6 11959: 9474:. 8th IAA Planetary Defense Conference. Vienna, Austria. 9022:

Bulletin of the Astronomical Institutes of Czechoslovakia

8841:

Naidu, Shantanu; Farnocchia, Davide (February 27, 2020).

7430: 7253:"2. Asteroid Compositional Types and their Distributions" 6639:"The NEO Surveyor Near-Earth Asteroid Known Object Model" 6105: 5992: 5834:

Binzel, Richard P. (2000). "Torino Impact Hazard Scale".

5152: 4714: 255: 146: 8041: 7201: 6539: 6537: 5136:"Antarctic Explosion Could Have Been Nuclear Detonation" 3975: 3646: 3644: 3642: 3362:"Near-Earth asteroids could be 'steppingstones to Mars'" 2803:

The first near-Earth comet visited by a space probe was

1482:, and comets create meteoroid streams that can generate 9807:

Table of Asteroids Next Closest Approaches to the Earth

9632:. Planetary Resources. January 12, 2018. Archived from 9411:"NASA's OSIRIS-REx Begins Earth-Trojan Asteroid Search" 7615: 7004: 6543: 5905: 5903: 5901: 5899: 5897: 5895: 5893: 5891: 4563: 3979:

Publications of the Astronomical Society of the Pacific

3605: 3458:. London: British National Space Centre. September 2000 1493:

As of April 5, 2024, 1,712 NEAs appear on the

1154:(at the time known only by its provisional designation 804:, making the latter the meteor's possible parent body. 9587: 9585: 8759: 8757: 8254: 8252: 8250: 8248: 7291: 3821:"Does Commercial Asteroid Mining Still Have A Future?" 3750: 3748: 2445:

List of minor planets and comets visited by spacecraft

2198:. Calculations for the 5 m (16 ft) asteroid 1787:(larger than 3.5 m (11 ft)) is estimated at 1463:, the Near-Earth Objects Coordination Centre (NEOCC). 678:

On August 10, 1972, a meteor that became known as the

378:

Near-Earth objects (NEOs) are formally defined by the

13616: 8379: 8163: 8161: 7172: 7170: 6727: 6534: 6458:. Vulcano, Italy: IAU. September 1995. Archived from 5448: 5446: 4739: 4246:. Johns Hopkins University Applied Physics Laboratory 3639: 3193:"The evolution of near Earth objects risk perception" 2396:

was detected unidentified and classified as asteroid

2244:

during its 0.10 AU approach of Earth in May 1910

1634:. The interaction with Jupiter through the resonance 1598:

in the sky during its September 2004 close approach (

1296:

Asteroids discovered in the first three years of the

722:(usually harmlessly), with most or all of the solids 566:

was discovered when it passed the Earth at twice the

475:

tried to measure the distance of a comet through its

440: 9409:

Morton, Erin; Neal-Jones, Nancy (February 9, 2017).

9371: 9178:"Earth May Have Captured a 1960s-Era Rocket Booster" 8766:"Dynamical evolution of near-Earth asteroid 1991 VG" 8640: 7433:"Radar Reveals Two Moons Orbiting Asteroid Florence" 6269: 6223: 5888: 5526: 5524: 4812:"Earth-grazing daylight fireball of August 10, 1972" 3475: 3473: 3326:"NASA is opening a new office for planetary defense" 2716:

In October 2024, ESA plans to launch the spacecraft

2543:, was explored from September 2005 to April 2007 by 1369:

In January 2016, NASA announced the creation of the

402:

which orbit bodies other than the Sun, like Earth's

9683:"An update on our progress towards mining in space" 9582: 8754: 8539: 8537: 8245: 5938:"Big new asteroid has slim chance of hitting Earth" 5071: 4952: 4404:"Small-Body Database Lookup. 1566 Icarus (1949 MA)" 4294:Sekanina, Zdenek; Chodas, Paul W. (December 2005). 3918: 3916: 3914: 3912: 3910: 3908: 3906: 3904: 3902: 3745: 2510:with and return from only about 1 in 10 using less 1863:, which orbit the Sun entirely within the orbit of 509:The first near-Earth asteroid to be discovered was 9556: 9117: 9115: 9113: 9111: 9109: 8158: 7167: 6479: 6477: 6249:"NASA Refines Asteroid Apophis' Path Toward Earth" 5739: 5443: 4707:"Asteroid 2012 DA14 in record-breaking Earth pass" 4605:"Closest Approaches to the Earth by Minor Planets" 3576: 3574: 3445: 3443: 3441: 3439: 3437: 3435: 3116: 3019: 3017: 3015: 3013: 3011: 3009: 3007: 1959:Most NEAs have orbits that are significantly more 1197: 1086:The National Aeronautics and Space Administration 847:Comprehensive Nuclear-Test-Ban Treaty Organization 9314: 8770:Monthly Notices of the Royal Astronomical Society 8557:Monthly Notices of the Royal Astronomical Society 8553:, the smallest and closest Earth quasi-satellite" 8481:Monthly Notices of the Royal Astronomical Society 8051:Monthly Notices of the Royal Astronomical Society 8044:"Dynamical study of the Atira group of asteroids" 7867:Monthly Notices of the Royal Astronomical Society 7564: 7096: 7094: 7092: 7090: 7088: 7086: 7084: 6923: 6921: 6919: 6637:Grav, Tommy; Mainzer, Amy K. (December 5, 2023). 6455:Vulcano Workshop. Beginning the Spaceguard Survey 6170: 5555: 5521: 5098: 5096: 4849: 3511: 3509: 3470: 3224: 3222: 3220: 2603:After completing its mission to Bennu, the probe 1871:, which have orbits entirely within the orbit of 1682:candidate asteroids identified by the algorithm. 262:) is less than 1.3 times the Earth–Sun distance ( 13676: 9681:Gialich, Matt; Acain, Jose (December 11, 2023). 9408: 9082:Chesley, Steve; Chodas, Paul (October 9, 2002). 8907:"Definitions of terms in meteor astronomy (IAU)" 8534: 8097: 8095: 8093: 8091: 8089: 7692: 7336: 6857: 6800:Kulkarni, S.R.; et al. (February 7, 2018). 6060:"Small-Body Database Lookup. 163132 (2002 CU11)" 5255:Shaddad, Muawia H.; et al. (October 2010). 4684:"Small-Body Database Lookup. 308635 (2005 YU55)" 4244:"Eros comes on stage, finally a useful asteroid" 3899: 3716: 3714: 3397: 3395: 3393: 3391: 3389: 3190: 2855:flew by the nucleus of Halley's Comet. In 1992, 2299: 1867:and which include the hypothetical sub-group of 11919: 9849:Minor Planet Center: Asteroid Hazards, Part 3: 9832:Minor Planet Center: Asteroid Hazards, Part 2: 9482: 9156:"MPC Database Search. Unknown object: 2013 QW1" 9106: 8990: 8840: 8636: 8634: 8632: 8474:"A long-lived horseshoe companion to the Earth" 7424: 6954: 6952: 6950: 6885: 6474: 5076:. Imperial College London / Purdue University. 4895: 4657:"This asteroid just skimmed Earth's atmosphere" 4418: 4090: 4070: 4068: 4066: 3814: 3812: 3571: 3432: 3355: 3353: 3004: 2984: 2982: 2980: 2978: 2976: 2974: 2972: 2970: 2968: 2773:, and then follow it up in 2025 with the probe 2626:in July 2026 and fast-rotating Apollo asteroid 2611:space probe was extended, to include flybys of 2596:, in May 2025, targeting Earth quasi-satellite 2570:The 980 m (3,220 ft) Apollo asteroid 1913:. (1.017 AU is Earth's aphelion distance.) 8965: 8963: 7921:Bolin, Bryce T.; et al. (November 2022). 7495:(Press release). B612 Foundation. May 31, 2022 7147: 7145: 7081: 6916: 6833:Ye, Quan-Zhi; et al. (February 8, 2018). 6448: 6446: 6444: 6381:"Giant bombs on giant rockets: Project Icarus" 6324:"Asteroid 2004 VD17 classed as Torino Scale 2" 6164: 5677: 5675: 5673: 5671: 5669: 5478: 5314: 5093: 4733: 4599: 4597: 4523: 4521: 4519: 4463: 4368: 4366: 4349:"Small-Body Database Lookup. P/1999 J6 (SOHO)" 4293: 4267: 4265: 4263: 4261: 4212: 3650: 3506: 3261:"WISE Revises Numbers of Asteroids Near Earth" 3217: 2449:Some NEOs are of special interest because the 2066:quasi-satellite orbits. One of these objects, 1626:are moved into the inner Solar System through 1617:, causing ejection from the Solar System or a 1416:List of near-Earth object observation projects 370: mi) of Earth's orbit) as of early 2013 ( 12080: 11891: 11628: 11614: 11118: 10627: 9880: 9285: 9081: 8898: 8863: 8472:Christou, A.A.; Asher, D.J. (July 11, 2011). 8471: 8449:. Western Washington University Planetarium. 8086: 7507: 7250: 6512:"New telescope will hunt dangerous asteroids" 6312: 6079: 6077: 5684:"History of The Asteroid/Comet Impact Hazard" 5406: 5339: 3784: 3782: 3711: 3686: 3684: 3682: 3680: 3546: 3386: 3284: 3282: 3186: 3184: 3182: 3180: 3178: 3176: 2600:and returning samples to Earth in late 2027. 562:In 1937, 800 m (2,600 ft) asteroid 9794:Center for Near Earth Object Studies (CNEOS) 9680: 9231:"Astronomers defend asteroid warning mix-up" 8864:Pokorý, Petr; Kuchner, Marc (October 2021). 8629: 7732: 7730: 7728: 6982: 6947: 6826: 6802:"The Zwicky Transient Facility (ZTF) begins" 6793: 6733: 6691:"Science Goals. What's in our Solar System?" 6632: 6630: 6628: 6626: 6346: 6240: 5533:"Largest lunar impact caught by astronomers" 5402: 5400: 5398: 5396: 5065: 5022: 5020: 5018: 4852:"Earth-grazing fireball of October 13, 1990" 4624: 4622: 4172:Journal of Astronomical History and Heritage 4063: 3925:"Origin and Evolution of Near-Earth Objects" 3809: 3542: 3540: 3350: 2965: 2656: 2567:spacecraft during a flyby in December 2012. 2427:Other artificial near-Earth objects include 2270:; while long-period comets originate in the 1894:. (0.983 AU is Earth's perihelion distance.) 1728:survey provided an alternative estimate of 1434: 8960: 8010: 8008: 7384:Kinematika I Fizika Nebesnykh Tel Supplimen 7257:International Astronomical Union Colloquium 7142: 6636: 6441: 6247:Brown, Dwayne; Agle, DC (October 7, 2009). 5666: 4946: 4594: 4516: 4363: 4300:The Astrophysical Journal Supplement Series 4273:"Closest Approaches to the Earth by Comets" 4258: 4039: 4037: 4035: 3879: 3877: 3875: 3849: 3847: 3845: 3843: 3651:Taylor Tillman, Nola (September 25, 2023). 3085: 3044: 3042: 2665:Spread of the plume from the impact of the 1327:Lowell Observatory Near-Earth-Object Search 1313:" activities (an umbrella term), including 1233:Annual NEA discoveries by survey: all NEAs 714:List of predicted asteroid impacts on Earth 11898: 11884: 11621: 11607: 11125: 11111: 10634: 10620: 9887: 9873: 8996: 8834: 7101:Luu, Jane; Jewitt, David (November 1989). 7057: 7055: 6505: 6503: 6074: 6028: 6026: 6024: 5731: 4850:Borovička, J.; Ceplecha, Z. (April 1992). 4698: 4044:Carlisle, Camille M. (December 30, 2011). 3779: 3677: 3580: 3279: 3255: 3253: 3251: 3230:"NASA on the Prowl for Near-Earth Objects" 3173: 2990:"Discovery Statistics – Cumulative Totals" 1802:The smallest known near-Earth asteroid is 837:blew up 37 km (23 mi) above the 533:List of asteroid close approaches to Earth 8889: 8799: 8781: 8661: 8586: 8568: 8510: 8492: 8281: 8205: 8126: 8104:"When the horseshoe fits: Characterizing 8062: 7963: 7941: 7897: 7879: 7757: 7736: 7725: 7313: 7268: 7100: 6674: 6656: 6623: 6559: 6246: 6184: 5803: 5801: 5530: 5483:. Dordrecht: Springer. pp. 575–598. 5393: 5290: 5231: 5213: 5180: 5015: 4991: 4619: 4469: 4396: 3991: 3537: 3323: 3132: 2777:, which is to land on the same asteroid. 2498:The IAU held a minor planets workshop in 1816: 1335:Campo Imperatore Near-Earth Object Survey 1284:also in Italy a year later. In 1998, the 1098:(Near Earth Objects Dynamic Site) by the 822:burns up as a meteor over northern France 286: 13411:Interstellar and circumstellar molecules 10641: 9340: 9322:"Hayabusa. The Final Approach. Overview" 9261:"MPEC 2015-H125: Deletion Of 2015 HP116" 9148: 9046: 8905:Perlerin, Vincent (September 26, 2017). 8904: 8734: 8699: 8347: 8005: 7698: 7469:. University of Washington. May 31, 2022 6799: 6318: 5935: 5929: 5531:Catanzaro, Michele (February 24, 2014). 5348:"Small asteroid 2014 AA hits Earth" 4809: 4654: 4648: 4043: 4032: 3872: 3840: 3818: 3791:"Early Results from NASA's DART Mission" 3788: 3319: 3317: 3232:. NASA/JPL. May 26, 2004. Archived from 3039: 2784: 2693:and impacted the Apollo asteroid's moon 2660: 2479: 2461: 2303: 2236: 2098: 1950: 1820: 1689: 1589: 1517: 1438: 1290: 1126: 1024: 882: 806: 551:in 1366. Orbital calculations show that 517: 455: 444: 341: 13607:) may be read as "within" or "part of". 12635:Planetary orbit-crossing minor planets 9228: 9124:"Rocket or Rock? NEO Confusion Abounds" 8939: 8814: 8014: 7849: 7675:"WISE's Survey of Near-Earth Asteroids" 7052: 6741:. United States Congress. p. 147. 6713:"Planetary Defense Coordination Office" 6500: 6483: 6422:. MIT. October 30, 1979. Archived from 6021: 5870:"Palermo Technical Impact Hazard Scale" 5862: 5772: 5766: 5681: 5320: 5254: 4527: 3789:Merzdorf, Jessica (December 15, 2022). 3754: 3614: 3581:Lakdawalla, Emily (December 14, 2012). 3401: 3359: 3248: 3191:Fernández Carril, Luis (May 14, 2012). 3048: 2438: 1946: 1585: 1505: 1262:Palomar Planet-Crossing Asteroid Survey 600:below), was an encounter with asteroid 289:(NEAs) and over 120 known short-period 14: 13677: 9606:from the original on November 14, 2017 9562: 9478:from the original on January 23, 2024. 9136:from the original on November 15, 2017 9121: 9019: 8382:"An asteroidal companion to the Earth" 8269:Communications Earth & Environment 8017:"Asteroid Classification I – Dynamics" 7672: 7621: 7443:from the original on September 3, 2017 7061: 7015: 5833: 5798: 5737: 5623:from the original on December 22, 2017 5345: 5146: 5053:from the original on February 14, 2022 5029:"Earth in the Cosmic Shooting Gallery" 4791:from the original on February 14, 2017 4759:from the original on December 22, 2017 4721:from the original on February 17, 2018 4704: 4206: 4125: 4096: 3720: 3690: 3479: 3324:Templeton, Graham (January 12, 2016). 3086:Monastersky, Richard (March 1, 1997). 3079: 2255:may have been caused by a fragment of 784:sensors. However this may have been a 596:that went through the atmosphere (see 425:(MOID) of 0.05 AU or less and an 290: 11879: 11602: 11528:Planetary Defense Coordination Office 11523:Space Situational Awareness Programme 11132: 11106: 10615: 10117:Outer Solar System, does not include 9868: 9733: 9654: 9591: 9536: 9488: 9439: 9421:from the original on February 7, 2018 9359:from the original on October 24, 2023 9346: 9229:Mullins, Justin (November 13, 2007). 9122:Azriel, Merryl (September 25, 2013). 8948:from the original on January 26, 2024 8921:from the original on January 23, 2018 8335:from the original on January 27, 2024 8313: 7920: 7737:Tricarico, Pasquale (March 1, 2017). 7713:from the original on November 4, 2017 7552:from the original on January 27, 2024 7539: 7513: 7062:Browne, Malcolm W. (April 25, 1996). 6935:from the original on January 26, 2024 6845:from the original on February 9, 2018 6814:from the original on February 9, 2018 6598: 6509: 6085:"29075 (1950 DA) Analyses, 2001-2007" 6040:from the original on January 26, 2024 5754:from the original on January 11, 2022 5719:from the original on November 9, 2017 5704: 5682:Chapman, Clark R. (October 7, 1998). 5608: 5460:from the original on January 27, 2024 5381:from the original on January 20, 2024 5375:"Fireballs. Fireball and Bolide Data" 5133: 5127: 5102: 5080:from the original on January 24, 2024 4655:Irizarry, Eddie (November 16, 2020). 4636:from the original on January 24, 2024 4384:from the original on January 23, 2023 4107:from the original on December 1, 2017 4100:A synopsis of the astronomy of comets 3767:from the original on January 25, 2024 3733:from the original on October 24, 2023 3691:Bardan, Roxana (September 27, 2022). 3665:from the original on January 25, 2024 3627:from the original on October 24, 2023 3615:Bartels, Meghan (November 13, 2019). 3494:from the original on October 20, 2023 3416:from the original on January 12, 2014 3314: 3302:from the original on December 1, 2017 3267:from the original on January 27, 2024 2451:sum total of changes in orbital speed 1466:Near-Earth objects are classified as 1371:Planetary Defense Coordination Office 1248:Massachusetts Institute of Technology 1081: 1071:Palermo Technical Impact Hazard Scale 958:Cretaceous–Paleogene extinction event 851:International Monitoring System (IMS) 730:waves, or the solid surface, forming 321:. The initial US Congress mandate to 9772:from the original on August 24, 2024 9759: 9565:"Asteroid Mining for Fun and Profit" 9390:from the original on October 6, 2023 9377: 9063:from the original on October 3, 2023 8997:Jenniksens, Peter (September 2005). 8815:Sinnott, Roger W. (April 17, 2007). 8735:Chandler, David L. (April 7, 2023). 8453:from the original on January 1, 2024 8353: 7964:Dickinson, David (August 25, 2021). 7673:Beatty, Kelly (September 30, 2011). 6929:"Discovery Statistics. Introduction" 6352: 6036:. NASA/JPL CNEOS. January 24, 2024. 5876:from the original on October 1, 2023 5815:from the original on January 3, 2024 5654:from the original on October 1, 2017 5641: 5543:from the original on October 4, 2021 5321:Tingley, Brett (September 4, 2024). 5115:from the original on August 19, 2017 4164: 3515: 3402:Portree, David S. (March 23, 2013). 2232: 1685: 1315:Lincoln Near-Earth Asteroid Research 274:(PHO). Most known PHOs and NEOs are 10994:Predicted asteroid impacts on Earth 9815:– Samara State Technical University 9708:"Falcon 9 Block 5 - PRIME-1 (IM-2)" 9057:Astronomical Society of the Pacific 8609: 8444: 7699:Williams, Matt (October 20, 2017). 7542:"Asteroid Population Count Slashed" 7412:. Johnston's Archive. April 5, 2024 6748:from the original on March 10, 2017 6391:from the original on April 15, 2016 6378: 5738:Molloy, Mark (September 24, 2017). 5705:Leary, Warren E. (April 20, 1989). 5609:Clark, Stuart (December 20, 2012). 5409:Meteoritics & Planetary Science 5271:Meteoritics & Planetary Science 5103:David, Leonard (November 1, 2013). 4963:Meteoritics & Planetary Science 4749:to Miss Earth on February 15, 2013" 4705:Palmer, Jason (February 15, 2013). 3957:from the original on August 9, 2017 3819:Dorminey, Bruce (August 31, 2021). 3374:from the original on April 17, 2012 3098:from the original on March 13, 2004 3052:Earth and Planetary Science Letters 2780: 2457: 2294:minimum orbit intersection distance 1717:Wide-field Infrared Survey Explorer 928:of humans and other life on Earth. 526: 506:has the same orbit as the Leonids. 423:minimum orbit intersection distance 293:(NECs). A number of solar-orbiting 258:whose closest approach to the Sun ( 24: 11915: 10999:Asteroid close approaches to Earth 9809:– Sormano Astronomical Observatory 9489:Jones, Andrew (November 6, 2023). 9241:from the original on March 7, 2017 8426:from the original on June 26, 2016 8354:Gohd, Chelsea (February 1, 2022). 7805: 6970:from the original on April 6, 2024 6832: 6522:from the original on June 26, 2015 6484:Chapman, Clark R. (May 21, 1998). 6009:from the original on March 4, 2016 5917:from the original on April 5, 2024 5644:"Noah's Comet. Edmond Halley 1694" 5302:from the original on March 4, 2016 4984:10.1111/j.1945-5100.2005.tb00157.x 4843: 4545:from the original on June 17, 2012 4146:from the original on March 1, 2018 3755:Loeffer, John (January 23, 2024). 3559:from the original on June 17, 2016 3516:Aron, Jacob (September 30, 2016). 3480:Beatty, Kelly (November 4, 2010). 3205:from the original on June 29, 2017 2280:, which is also the source of the 1694:Known near-Earth asteroids by size 597: 441:History of human awareness of NEOs 437:of 14%), are not considered PHAs. 25: 13711: 9787: 9592:Boyle, Alan (November 13, 2017). 9328:from the original on June 2, 2023 8999:Meteor Showers from Broken Comets 8940:Yeomans, Donald K. (April 2007). 8915:International Meteor Organization 6781:from the original on June 4, 2023 6328:Asteroid and Comet Impact Hazards 5948:from the original on May 31, 2015 5454:"Lunar Impact Monitoring Program" 5346:Beatty, Kelly (January 2, 2014). 4193:10.3724/SP.J.1440-2807.1998.01.01 3721:Rincon, Paul (December 6, 2020). 3593:from the original on July 7, 2017 3360:Vergano, Dan (February 2, 2007). 3338:from the original on July 6, 2017 3290:"Public Law 109–155–DEC.30, 2005" 2807:in 1985, when the NASA/ESA probe 2687:spacecraft reached the system of 2326:An object classified as asteroid 2018:, both circling Earth's L4 point. 13662: 13650: 13638: 13626: 13498: 13486: 13474: 11905: 11031:Asteroids crossing Earth's orbit 10741:2002 Eastern Mediterranean event 10596: 10595: 10090:Between Earth and the main belt 9753: 9734:Foust, Jeff (January 30, 2023). 9727: 9700: 9674: 9655:Boyle, Alan (November 4, 2019). 9618: 9563:Beatty, Kelly (April 24, 2012). 9537:Jones, Andrew (April 11, 2023). 9530: 9508: 9461: 9433: 9402: 9378:Wall, Mike (September 9, 2016). 9347:Clark, Stephen (June 28, 2018). 9279: 9265:Minor Planet Electronic Circular 9253: 9222: 9196: 9170: 9075: 9040: 9013: 8933: 8857: 8808: 8728: 8693: 8603: 8512:10.1111/j.1365-2966.2011.18595.x 8465: 8438: 8373: 8035: 8015:Galache, J. L. (March 5, 2011). 7983: 7957: 7914: 7827: 7666: 7540:Platt, Jane (January 12, 2000). 7533: 7514:Chang, Kenneth (June 14, 2018). 7481: 7455: 7402: 7375: 7330: 7285: 7251:Zellner, B.; Bowell, E. (1977). 7244: 7195: 6879: 6760: 6705: 6683: 6592: 5429:10.1111/j.1945-5100.2009.01009.x 5292:10.1111/j.1945-5100.2010.01116.x 4010:10.1088/1538-3873/129/973/034402 3263:. NASA/JPL. September 29, 2011. 2992:. NASA/JPL CNEOS. March 30, 2024 2938:List of Earth-crossing asteroids 2887:began orbiting near-Earth comet 1659:gravitational interactions with 1428:Double Asteroid Redirection Test 1223: 1212: 760: 691:Earth-grazing meteoroid EN131090 665: 649: 380:International Astronomical Union 170: 158: 96: 72: 45: 13374:Gravitationally rounded objects 10485:Asteroids visited by spacecraft 9440:Jones, Andrew (June 26, 2023). 8700:Phillips, Tony (June 9, 2006). 6734:U.S.Congress (March 19, 2013). 6403: 6379:Day, Dwayne A. (July 5, 2004). 6372: 6286: 6263: 6217: 6099: 6052: 5986: 5960: 5936:Chandler, David (May 2, 2006). 5827: 5698: 5635: 5602: 5577: 5472: 5377:. NASA/JPL. December 30, 2023. 5367: 5248: 5189: 5160:Journal of Geophysical Research 4889: 4803: 4771: 4676: 4557: 4341: 4287: 4236: 4158: 4119: 3969: 3885:"Definitions & Assumptions" 3583:"Chang'e 2 imaging of Toutatis" 2943:List of impact craters on Earth 2810:International Cometary Explorer 2736: 1339:Japanese Spaceguard Association 1198:Projects to minimize the threat 862:Long Duration Exposure Facility 490:The extraterrestrial origin of 348:potentially hazardous asteroids 79:Very faint near-Earth asteroid 9760:Wall, Mike (August 21, 2024). 8610:Lea, Robert (April 23, 2024). 8193:Astrophysics and Space Science 6510:Shiga, David (June 27, 2006). 6488:. Southwest Research Institute 6411:"MIT Course precept for movie" 6353:Deen, Sam (October 17, 2017). 6062:. NASA/JPL. September 13, 2023 5686:. Southwest Research Institute 5074:"Earth Impact Effects Program" 3110: 2681:On September 26, 2022, NASA's 1191:potentially hazardous asteroid 1017: 940:was caused by a comet impact. 615:On November 8, 2011, asteroid 337: 13: 1: 10779:2012 United Kingdom meteoroid 9894: 9184:. NASA/JPL. November 12, 2020 8870:The Planetary Science Journal 7324:10.1016/S0019-1035(03)00047-2 7038:10.1126/science.288.5474.2190 6910:10.1016/S0032-0633(96)00153-5 6644:The Planetary Science Journal 6355:"2022 recovery of 2010 RF12?" 5856:10.1016/S0032-0633(00)00006-4 3482:"Mr. Hartley's Amazing Comet" 2959: 2876:flew by the near-Earth comet 2669:space probe on asteroid moon 2643:, to explore Apollo asteroid 2300:Artificial near-Earth objects 2216: 1825:NEA orbital groups (NASA/JPL) 811:Seven hours after discovery, 419:potentially hazardous objects 11498:Japan Spaceguard Association 11241:Earth-crossing minor planets 11198:Potentially hazardous object 11092:Potentially hazardous object 9210:. NASA/JPL. December 2, 2020 8680:10.1016/j.icarus.2022.115330 8115:Astronomy & Astrophysics 7837:. NASA/JPL. January 23, 2024 7776:10.1016/j.icarus.2016.12.008 7153:"Mission Orbit and Timeline" 6599:Crane, Leah (Jan 22, 2020). 6203:10.1016/j.icarus.2013.09.022 5995:"The problem with 2002 CU11" 5809:"Torino Impact Hazard Scale" 5497:10.1007/978-94-017-2071-7_42 4856:Astronomy & Astrophysics 4817:Astronomy & Astrophysics 4779:"Grand Teton Meteor (video)" 4630:"NEO Earth Close Approaches" 4494:10.1126/science.162.3856.903 4449:10.1016/0019-1035(69)90101-8 4406:. NASA/JPL. January 20, 2024 3120:Geophysical Research Letters 2761:, plans to launch the probe 1594:One-minute path of asteroid 1323:Near-Earth Asteroid Tracking 1280:, Italy in 1995, and set up 893:potentially hazardous object 680:1972 Great Daylight Fireball 449:1910 drawing of the path of 285:There are over 34,000 known 272:potentially hazardous object 103:Nucleus of near-Earth comet 7: 13469:Outline of the Solar System 13232:Interplanetary medium/space 11588:Fiction about impact events 8145:10.1051/0004-6361/202347663 7410:"Asteroids with Satellites" 6889:Planetary and Space Science 6865:"The NEO Confirmation Page" 6693:. Vera C. Rubin Observatory 6578:10.1088/0004-637X/743/2/156 5836:Planetary and Space Science 5563:"About the NELIOTA project" 4810:Ceplecha, Z. (March 1994). 4686:. NASA/JPL. January 7, 2022 2900: 2745:In April 2012, the company 2697:, in a test of a method of 2514:than is necessary to reach 1930:1.017 AU < q < 1.3 AU 1654:A small number of NEAs are 903:Through human history, the 10: 13716: 13185:Extraterrestrial materials 11047:Asteroid impact prediction 10746:2007 Carancas impact event 9834:The Challenge of Detection 9288:Advances in Space Research 9090:. NASA/JPL. Archived from 8300:10.1038/s43247-023-01031-w 6300:. NASA/JPL. March 25, 2021 5257:"The recovery of asteroid 4351:. NASA/JPL. April 16, 2021 4218:Acta Historica Astronomiae 4046:"Pseudo-moons orbit Earth" 3088:"The Call of Catastrophes" 3073:10.1016/j.epsl.2004.03.004 2883:In August 2014, ESA probe 2859:also visited another NEC, 2442: 2429:Elon Musk's Tesla Roadster 2296:is 11 million kilometres. 2049:period of about 350 years. 1975:, which corresponds to an 1413: 1388:Rep. Chris Stewart (R, UT) 1343:Asiago-DLR Asteroid Survey 1201: 879:Asteroid impact prediction 876: 855:Asteroid impact prediction 711: 705: 701: 530: 13505:Earth sciences portal 13464: 13419: 13356: 13227:Interplanetary dust cloud 13106: 12942: 12872: 12583: 12525: 12218: 12071: 11913: 11847: 11789: 11726: 11678: 11645: 11636: 11630:Small Solar System bodies 11570: 11536: 11518:The Spaceguard Foundation 11485: 11391: 11264: 11236:Asteroid close approaches 11214:Asteroid impact avoidance 11206: 11140: 11052:Asteroid impact avoidance 11039: 10986: 10943: 10928: 10768:2009 Sulawesi superbolide 10733: 10656: 10649: 10579: 10546: 10533:Discovering observatories 10508: 10475: 10318: 10207: 10198: 10168: 10159: 9992: 9902: 9826:The NEO Confirmation Page 9798:Jet Propulsion Laboratory 9308:10.1016/j.asr.2007.03.025 9267:. IAU/MPC. April 27, 2015 8942:"Great Comets in History" 8224:10.1007/s10509-016-2711-6 8019:. IAU/MPC. Archived from 7813:"Asteroid Size Estimator" 7270:10.1017/S0252921100070093 6839:The Astronomer's Telegram 6807:The Astronomer's Telegram 6547:The Astrophysical Journal 6359:Minor Planet Mailing List 5134:Allen, Robert S. (1963). 4165:Dick, S. J. (June 1998). 3589:. The Planetary Society. 2918:Asteroid Redirect Mission 2889:67P/Churyumov–Gerasimenko 2791:67P/Churyumov–Gerasimenko 2657:Asteroid deflection tests 2649:, the parent body of the 2484:Image mosaic of asteroid 2221:In 1961, the IAU defined 1570:more likely than that of 1453:Jet Propulsion Laboratory 1435:Number and classification 1409:Zwicky Transient Facility 1359:Vera C. Rubin Observatory 1282:The Spaceguard Foundation 1204:Asteroid impact avoidance 696:European Fireball Network 384:small Solar System bodies 304:Asteroid impact avoidance 169: 157: 152: 137: 127: 122: 39: 34: 13518:Local Interstellar Cloud 12236:other near-Earth objects 11583:Fiction about meteoroids 11462:Sentinel Space Telescope 10954:Impact events on Jupiter 9915:Physical characteristics 9047:Stephens, Sally (1993). 7835:"1036 Ganymed (A924 UB)" 7108:The Astronomical Journal 6931:. NASA/JPL CNEOS. 2012. 5776:NEO Research and the IAU 3025:"NEO Basics. NEO Groups" 1973:co-orbital configuration 1511:more counted, and these 1237:and NEAs > 1 km 1131:Radar image of asteroid 540:73P/Schwassmann–Wachmann 460:The near-Earth asteroid 346:Plot of orbits of known 13481:Solar System portal 13207:Giant-impact hypothesis 12814:Trans-Neptunian objects 11219:Asteroid laser ablation 10725:Earth-grazing meteoroid 10719:Great Daylight Fireball 10689:Great Meteor Procession 8978:. NASA. August 22, 2003 8216:2016Ap&SS.361..121D 8137:2024A&A...681A...4D 7991:"Unusual Minor Planets" 7644:10.1126/science.1065318 7361:10.1023/A:1010431023010 6964:JPL Small-Body Database 6902:1998P&SS...46..299M 6135:10.1126/science.1068191 5848:2000P&SS...48..297B 5421:2010M&PS...45..114R 5283:2010M&PS...45.1557S 4976:2005M&PS...40..817C 4868:1992A&A...257..323B 4830:1994A&A...283..287C 4607:. IAU/MPC. May 16, 2019 4275:. IAU/MPC. May 16, 2019 4126:Stoyan, Ronald (2015). 4097:Halley, Edmund (1705). 3948:10.2307/j.ctv1v7zdn4.33 3065:2004E&PSL.222....1C 2933:Interstellar interpoler 2749:announced its plans to 2708:, which separated from 2386:uncrewed lunar lander. 2321:final stages of rockets 2278:Comet 109P/Swift–Tuttle 1649:asteroid spectral types 1495:Sentry impact risk page 872: 309:Two scales, the simple 252:small Solar System body 132:Small Solar System body 13369:Possible dwarf planets 13212:Gravitational collapse 13150:Circumstellar envelope 11955: 11755:Trans-Neptunian object 11158:Earth-grazing fireball 11062:Earth-grazing fireball 10960:Comet Shoemaker–Levy 9 10564:Asteroids in astrology 8817:"Earth's "other moon"" 7943:10.1093/mnrasl/slac089 7231:10.1006/icar.1996.0133 6330:. NASA. Archived from 5140:The San Bernardino Sun 4103:. London: John Senex. 2923:Claimed moons of Earth 2800: 2678: 2495: 2477: 2433:Kepler space telescope 2380:Centaur rocket booster 2312: 2266:, beyond the orbit of 2245: 2150: 1956: 1826: 1817:Orbital classification 1695: 1603: 1563:direction of the Sun. 1523: 1444: 1400: 1396:United States Congress 1392:Dr. Michael F. A'Hearn 1347:Near-Earth Object WISE 1302: 1298:Near-Earth Object WISE 1286:United States Congress 1274:United States Congress 1137: 1034: 981:Comet Shoemaker–Levy 9 900: 823: 673:Earth-grazing fireball 468: 453: 375: 278:, but about 0.35% are 13578:Laniakea Supercluster 13195:Sample-return mission 11954: 10937:Impact events on Mars 10819:2015 Kerala meteoroid 10814:2014 Ontario fireball 10796:Chelyabinsk meteorite 10763:Buzzard Coulee meteor 10119:distant minor planets 9979:Palomar–Leiden survey 9937:Gravitational keyhole 9129:Space Safety Magazine 8801:10.1093/mnras/stx2545 8716:on September 29, 2006 8588:10.1093/mnras/stw1972 7899:10.1093/mnras/stz1437 7340:Solar System Research 5481:Leonid Storm Research 5233:10.1093/mnrasl/slu078 5142:(Dec 4): 40 column f. 4742:"Near-Earth Asteroid 4129:Atlas of Great Comets 2788: 2664: 2651:Geminid meteor shower 2504:University of Chicago 2483: 2465: 2443:Further information: 2307: 2282:Perseid meteor shower 2240: 2114:'s orbit around Earth 2102: 1954: 1824: 1693: 1593: 1582:brighter than 17.75. 1521: 1442: 1414:Further information: 1378: 1294: 1130: 1100:European Space Agency 1028: 962:large asteroid impact 895:that passed within 4 886: 810: 778:Prince Edward Islands 689:On October 13, 1990, 518:Encounters with Earth 464:as seen by the probe 459: 448: 345: 313:and the more complex 13493:Astronomy portal 13394:Solar System objects 13140:Circumplanetary disk 11728:Distant minor planet 11503:Meteoritical Society 10824:2015 Thailand bolide 10774:Sutter's Mill meteor 10643:Modern impact events 10559:Asteroids in fiction 8702:"Corkscrew asteroid" 8064:10.1093/mnras/stw642 5968:"NEODyS-2 Risk List" 5277:(10–11): 1557–1589. 5182:10.1029/2009JE003334 4787:. 10 November 2007. 3986:(973). part 034402. 3855:"Near Earth Objects" 3151:10.1002/2017gl073191 2861:26P/Grigg–Skjellerup 2805:21P/Giacobini–Zinner 2439:Exploratory missions 2342:rocket that carried 2156:Temporary satellites 1947:Co-orbital asteroids 1704:stellar occultations 1666:Many asteroids have 1608:near-Earth asteroids 1586:Near-Earth asteroids 1513:observational biases 1506:Observational biases 1354:George E. Brown, Jr. 1117:next two centuries, 998:In 1998, the movies 750:, comparable to the 568:distance of the Moon 496:Leonid meteor shower 287:near-Earth asteroids 18:Near-Earth asteroids 13592:Observable universe 13389:Solar System models 13319:Protoplanetary disk 13242:Interstellar medium 13202:Frost/Ice/Snow line 11407:Catalina Sky Survey 10804:Braunschweig meteor 10707:Sikhote-Alin meteor 9820:Minor Planet Center 9636:on January 13, 2018 9569:Sky & Telescope 9300:2007AdSpR..40..220X 9084:"J002E3: An Update" 9034:1978BAICz..29..129K 9007:2007ESASP.643....3J 8882:2021PSJ.....2..193P 8821:Sky & Telescope 8792:2018MNRAS.473.2939D 8741:Sky & Telescope 8672:2023Icar..39015330D 8579:2016MNRAS.462.3441D 8503:2011MNRAS.414.2965C 8401:1997Natur.387..685W 8292:2023ComEE...4..372C 7970:Sky & Telescope 7890:2019MNRAS.487.2742D 7768:2017Icar..284..416T 7679:Sky & Telescope 7636:2001Sci...294.1691S 7630:(5547): 1691–1693. 7585:2000Natur.403..165R 7396:2000KFNTS...3..213L 7353:2001SoSyR..35..227L 7306:2003Icar..163..120M 7223:1996Icar..122..406B 7121:1989AJ.....98.1905L 7030:2000Sci...288.2190B 7024:(5474): 2190–2194. 6667:2023PSJ.....4..228G 6570:2011ApJ...743..156M 6462:on October 31, 2013 6334:on October 14, 2011 6195:2014Icar..229..321F 6127:2002Sci...296..132G 6034:"Date/Time Removed" 5911:"Sentry Risk Table" 5785:2001ccno.conf...97R 5747:The Daily Telegraph 5489:2000lsr..book..575B 5353:Sky & Telescope 5224:2014MNRAS.443L..39D 5173:2009JGRE..114.8006S 5047:2005Obs...125..319A 4917:1994Natur.367...33C 4580:1991Natur.354..287S 4486:1968Sci...162..903G 4441:1969Icar...10..432P 4312:2005ApJS..161..551S 4230:2002AcHA...15..210S 4185:1998JAHH....1....1D 4050:Sky & Telescope 4002:2017PASP..129c4402W 3940:2002aste.book..409M 3487:Sky & Telescope 3143:2017GeoRL..44.3433R 3092:Science News Online 2891:, while its lander 2747:Planetary Resources 2488:, target of NASA's 2466:Different views of 2023:Horseshoe librators 1624:main-belt asteroids 1600:Paranal Observatory 1449:Minor Planet Center 1331:Catalina Sky Survey 866:interplanetary dust 549:Comet Tempel–Tuttle 13690:Near-Earth objects 13572:Virgo Supercluster 13553:Milky Way subgroup 13384:Natural satellites 13267:Nebular hypothesis 13247:Interstellar space 13237:Interstellar cloud 13145:Circumstellar disc 12735:Near-Earth objects 12619:names and meanings 11956: 11571:Related categories 10791:Chelyabinsk meteor 10038:Interior to Earth 8891:10.3847/PSJ/ac1e9b 8656:. section 115330. 8276:(1). section 372. 7520:The New York Times 7439:. NASA/JPL CNEOS. 7068:The New York Times 6841:. No. 11274. 6810:. No. 11266. 6676:10.3847/PSJ/ad072e 6429:on August 11, 2014 5913:. NASA/JPL CNEOS. 5872:. NASA/JPL CNEOS. 5811:. NASA/JPL CNEOS. 5712:The New York Times 4755:. NASA/JPL CNEOS. 4632:. NASA/JPL CNEOS. 4531:(March 29, 1998). 3236:on August 13, 2022 2801: 2679: 2653:, during a flyby. 2598:469219 Kamoʻoalewa 2557:, was explored by 2496: 2478: 2470:as seen by NASA's 2313: 2246: 2151: 2063:469219 Kamoʻoalewa 1957: 1837:distance (q), and 1827: 1712:absolute magnitude 1696: 1672:minor-planet moons 1668:natural satellites 1628:orbital resonances 1604: 1580:absolute magnitude 1524: 1445: 1394:, April 10, 2013, 1303: 1270:Snowmass, Colorado 1164:In February 2006, 1138: 1082:Highly rated risks 1035: 901: 864:, which collected 824: 790:Chelyabinsk meteor 740:asteroid main belt 469: 454: 427:absolute magnitude 400:natural satellites 388:astronomical units 376: 107:as seen by NASA's 13695:Planetary defense 13614: 13613: 13459: 13458: 13455: 13454: 13432:Lagrangian points 13404:by discovery date 13002:Human spaceflight 12973:historical models 12866: 12865: 12491:S/2015 (136472) 1 11873: 11872: 11785: 11784: 11670:Meanings of names 11596: 11595: 11537:Potential threats 11229:Ion-beam shepherd 11193:Near-Earth object 11173:Meteor procession 11134:Planetary defense 11100: 11099: 11087:Near-Earth object 11067:Meteor procession 11014:Meteor air bursts 10924: 10923: 10861:Winchcombe meteor 10855:2020 China bolide 10834:2017 China bolide 10609: 10608: 10471: 10470: 10467: 10466: 9910:Notable asteroids 9053:Cosmic Collisions 8395:(6634): 685–686. 8331:. July 27, 2011. 8327:(Press release). 7793:on March 10, 2018 7579:(6766): 165–166. 6966:. April 6, 2024. 6322:(March 1, 2006). 6121:(5565): 132–136. 5648:Jasoncolavito.com 5642:Colavito, Jason. 5506:978-90-481-5624-5 4574:(6351): 287–289. 4529:Marsden, Brian G. 4480:(3856): 903–904. 4139:978-1-107-09349-2 2870:, the NASA probe 2793:as seen by ESA's 2789:Nucleus of comet 2699:planetary defense 2512:propulsive energy 2418:space observatory 2249:Near-Earth comets 2233:Near-Earth comets 1990:Lagrangian points 1977:orbital resonance 1686:Size distribution 1551:over carbon-rich 1309:have undertaken " 1266:interdisciplinary 1092:Sentry Risk Table 1069:The more complex 504:55P/Tempel–Tuttle 291:near-Earth comets 264:astronomical unit 244:near-Earth object 206:: 12,213 (35.17%) 196:: 19,613 (56.48%) 181: 180: 35:Near-Earth object 16:(Redirected from 13707: 13667: 13666: 13655: 13654: 13653: 13643: 13642: 13641: 13631: 13630: 13622: 13608: 13606: 13597: 13590: 13583: 13576: 13570: 13564: 13558: 13551: 13544: 13537: 13530: 13523: 13516: 13503: 13502: 13501: 13491: 13490: 13489: 13479: 13478: 13477: 13180:Exozodiacal dust 12870: 12869: 12836:Detached objects 12078: 12077: 12074: 12073: 11918: 11900: 11893: 11886: 11877: 11876: 11643: 11642: 11623: 11616: 11609: 11600: 11599: 11168:Meteor air burst 11127: 11120: 11113: 11104: 11103: 10915: 10904: 10893: 10882: 10871: 10845:Kamchatka meteor 10756: 10713:Murchison meteor 10654: 10653: 10636: 10629: 10622: 10613: 10612: 10599: 10598: 10205: 10204: 10166: 10165: 10139:Neptune-crossers 10124:Jupiter-crossers 10111:Active asteroids 10047:Mercury-crossers 9947:Close approaches 9927:Impact avoidance 9889: 9882: 9875: 9866: 9865: 9861: 9853: 9851:Finding the Path 9844: 9836: 9782: 9781: 9779: 9777: 9757: 9751: 9750: 9748: 9746: 9731: 9725: 9724: 9722: 9720: 9713:Next Spaceflight 9704: 9698: 9697: 9695: 9693: 9678: 9672: 9671: 9669: 9667: 9652: 9646: 9645: 9643: 9641: 9622: 9616: 9615: 9613: 9611: 9589: 9580: 9579: 9577: 9575: 9560: 9554: 9553: 9551: 9549: 9534: 9528: 9527: 9525: 9523: 9512: 9506: 9505: 9503: 9501: 9486: 9480: 9479: 9465: 9459: 9458: 9456: 9454: 9437: 9431: 9430: 9428: 9426: 9406: 9400: 9399: 9397: 9395: 9375: 9369: 9368: 9366: 9364: 9344: 9338: 9337: 9335: 9333: 9318: 9312: 9311: 9283: 9277: 9276: 9274: 9272: 9257: 9251: 9250: 9248: 9246: 9226: 9220: 9219: 9217: 9215: 9200: 9194: 9193: 9191: 9189: 9174: 9168: 9167: 9165: 9163: 9152: 9146: 9145: 9143: 9141: 9119: 9104: 9103: 9101: 9099: 9079: 9073: 9072: 9070: 9068: 9044: 9038: 9037: 9017: 9011: 9010: 8994: 8988: 8987: 8985: 8983: 8977: 8967: 8958: 8957: 8955: 8953: 8937: 8931: 8930: 8928: 8926: 8902: 8896: 8895: 8893: 8861: 8855: 8854: 8852: 8850: 8845:. NASA/JPL CNEOS 8838: 8832: 8831: 8829: 8827: 8812: 8806: 8805: 8803: 8785: 8776:(3): 2939–2948. 8761: 8752: 8751: 8749: 8747: 8732: 8726: 8725: 8723: 8721: 8712:. Archived from 8697: 8691: 8690: 8688: 8686: 8665: 8647: 8638: 8627: 8626: 8624: 8622: 8607: 8601: 8600: 8590: 8572: 8563:(4): 3441–3456. 8552: 8548:(469219) 2016 HO 8541: 8532: 8531: 8529: 8527: 8514: 8496: 8487:(4): 2965–2969. 8478: 8469: 8463: 8462: 8460: 8458: 8442: 8436: 8435: 8433: 8431: 8425: 8386: 8377: 8371: 8370: 8368: 8366: 8351: 8345: 8344: 8342: 8340: 8317: 8311: 8310: 8308: 8306: 8285: 8265: 8256: 8243: 8242: 8240: 8238: 8209: 8187: 8180: 8176: 8165: 8156: 8155: 8153: 8151: 8130: 8110: 8099: 8084: 8083: 8081: 8079: 8066: 8057:(4): 4471–4476. 8048: 8039: 8033: 8032: 8030: 8028: 8023:on March 3, 2016 8012: 8003: 8002: 8000: 7998: 7987: 7981: 7980: 7978: 7976: 7961: 7955: 7954: 7952: 7950: 7945: 7927: 7918: 7912: 7911: 7901: 7883: 7874:(2): 2742–2752. 7853: 7847: 7846: 7844: 7842: 7831: 7825: 7824: 7822: 7820: 7815:. NASA/JPL CNEOS 7809: 7803: 7802: 7800: 7798: 7792: 7786:. Archived from 7761: 7743: 7734: 7723: 7722: 7720: 7718: 7696: 7690: 7689: 7687: 7685: 7670: 7664: 7663: 7619: 7613: 7612: 7593:10.1038/35003128 7568: 7562: 7561: 7559: 7557: 7537: 7531: 7530: 7528: 7526: 7511: 7505: 7504: 7502: 7500: 7485: 7479: 7478: 7476: 7474: 7459: 7453: 7452: 7450: 7448: 7428: 7422: 7421: 7419: 7417: 7406: 7400: 7399: 7379: 7373: 7372: 7334: 7328: 7327: 7317: 7289: 7283: 7282: 7272: 7248: 7242: 7241: 7239: 7237: 7208: 7199: 7193: 7192: 7190: 7188: 7174: 7165: 7164: 7162: 7160: 7149: 7140: 7139: 7137: 7135: 7115:(5): 1905–1911. 7098: 7079: 7078: 7076: 7074: 7059: 7050: 7049: 7013: 7002: 7001: 6999: 6997: 6986: 6980: 6979: 6977: 6975: 6956: 6945: 6944: 6942: 6940: 6925: 6914: 6913: 6883: 6877: 6876: 6874: 6872: 6861: 6855: 6854: 6852: 6850: 6830: 6824: 6823: 6821: 6819: 6797: 6791: 6790: 6788: 6786: 6764: 6758: 6757: 6755: 6753: 6747: 6740: 6731: 6725: 6724: 6722: 6720: 6709: 6703: 6702: 6700: 6698: 6687: 6681: 6680: 6678: 6660: 6651:(12). part 228. 6634: 6621: 6615: 6613: 6611: 6596: 6590: 6589: 6563: 6541: 6532: 6531: 6529: 6527: 6507: 6498: 6497: 6495: 6493: 6481: 6472: 6471: 6469: 6467: 6450: 6439: 6438: 6436: 6434: 6428: 6415: 6407: 6401: 6400: 6398: 6396: 6385:The Space Review 6376: 6370: 6369: 6367: 6365: 6350: 6344: 6343: 6341: 6339: 6316: 6310: 6309: 6307: 6305: 6290: 6284: 6283: 6281: 6279: 6274:. NASA/JPL CNEOS 6267: 6261: 6260: 6258: 6256: 6251:. NASA/JPL CNEOS 6244: 6238: 6237: 6235: 6233: 6228:. NASA/JPL CNEOS 6221: 6215: 6214: 6188: 6168: 6162: 6161: 6159: 6157: 6112: 6103: 6097: 6096: 6094: 6092: 6087:. NASA/JPL CNEOS 6081: 6072: 6071: 6069: 6067: 6056: 6050: 6049: 6047: 6045: 6030: 6019: 6018: 6016: 6014: 6001:. Vol. 12. 5990: 5984: 5983: 5981: 5979: 5964: 5958: 5957: 5955: 5953: 5933: 5927: 5926: 5924: 5922: 5907: 5886: 5885: 5883: 5881: 5866: 5860: 5859: 5831: 5825: 5824: 5822: 5820: 5805: 5796: 5795: 5793: 5791: 5770: 5764: 5763: 5761: 5759: 5743: 5735: 5729: 5728: 5726: 5724: 5702: 5696: 5695: 5693: 5691: 5679: 5664: 5663: 5661: 5659: 5639: 5633: 5632: 5630: 5628: 5606: 5600: 5599: 5597: 5595: 5581: 5575: 5574: 5572: 5570: 5559: 5553: 5552: 5550: 5548: 5528: 5519: 5518: 5476: 5470: 5469: 5467: 5465: 5450: 5441: 5440: 5404: 5391: 5390: 5388: 5386: 5371: 5365: 5364: 5362: 5360: 5343: 5337: 5336: 5334: 5333: 5318: 5312: 5311: 5309: 5307: 5301: 5294: 5268: 5263: 5252: 5246: 5245: 5235: 5217: 5193: 5187: 5186: 5184: 5150: 5144: 5143: 5131: 5125: 5124: 5122: 5120: 5100: 5091: 5089: 5087: 5085: 5069: 5063: 5062: 5060: 5058: 5024: 5013: 5012: 5010: 5008: 4995: 4959: 4950: 4944: 4943: 4941: 4939: 4925:10.1038/367033a0 4902: 4893: 4887: 4886: 4884: 4882: 4847: 4841: 4840: 4838: 4836: 4807: 4801: 4800: 4798: 4796: 4775: 4769: 4768: 4766: 4764: 4748: 4737: 4731: 4730: 4728: 4726: 4702: 4696: 4695: 4693: 4691: 4680: 4674: 4673: 4671: 4669: 4652: 4646: 4645: 4643: 4641: 4626: 4617: 4616: 4614: 4612: 4601: 4592: 4591: 4588:10.1038/354287a0 4561: 4555: 4554: 4552: 4550: 4538:The Boston Globe 4525: 4514: 4513: 4467: 4461: 4460: 4422: 4416: 4415: 4413: 4411: 4400: 4394: 4393: 4391: 4389: 4370: 4361: 4360: 4358: 4356: 4345: 4339: 4338: 4336: 4334: 4291: 4285: 4284: 4282: 4280: 4269: 4256: 4255: 4253: 4251: 4240: 4234: 4233: 4210: 4204: 4203: 4201: 4199: 4162: 4156: 4155: 4153: 4151: 4123: 4117: 4116: 4114: 4112: 4094: 4088: 4087: 4085: 4083: 4072: 4061: 4060: 4058: 4056: 4041: 4030: 4029: 3995: 3973: 3967: 3966: 3964: 3962: 3956: 3929: 3920: 3897: 3896: 3894: 3892: 3881: 3870: 3869: 3867: 3865: 3851: 3838: 3837: 3835: 3833: 3816: 3807: 3806: 3804: 3802: 3786: 3777: 3776: 3774: 3772: 3752: 3743: 3742: 3740: 3738: 3718: 3709: 3708: 3706: 3704: 3688: 3675: 3674: 3672: 3670: 3648: 3637: 3636: 3634: 3632: 3612: 3603: 3602: 3600: 3598: 3578: 3569: 3568: 3566: 3564: 3544: 3535: 3534: 3532: 3530: 3513: 3504: 3503: 3501: 3499: 3477: 3468: 3467: 3465: 3463: 3457: 3447: 3430: 3429: 3423: 3421: 3399: 3384: 3383: 3381: 3379: 3357: 3348: 3347: 3345: 3343: 3321: 3312: 3311: 3309: 3307: 3301: 3294: 3286: 3277: 3276: 3274: 3272: 3257: 3246: 3245: 3243: 3241: 3226: 3215: 3214: 3212: 3210: 3198:The Space Review 3188: 3171: 3170: 3136: 3127:(8): 3433–3440. 3114: 3108: 3107: 3105: 3103: 3083: 3077: 3076: 3046: 3037: 3036: 3034: 3032: 3027:. NASA/JPL CNEOS 3021: 3002: 3001: 2999: 2997: 2986: 2908:Asteroid capture 2781:Missions to NECs 2732: 2730: 2729: 2692: 2648: 2636: 2634: 2633: 2625: 2623: 2622: 2615:Apollo asteroid 2599: 2458:Missions to NEAs 2409: 2402: 2377: 2371: 2364: 2353: 2208: 2206: 2205: 2197: 2195: 2194: 2186: 2184: 2183: 2175: 2173: 2172: 2164: 2149: 2147: 2138: 2136: 2127: 2126: 2119: 2113: 2111: 2110: 2087: 2085: 2084: 2076: 2074: 2073: 2054:Quasi-satellites 2044: 2042: 2041: 2037:(419624) 2010 SO 2017: 2015: 2014: 2010:(614689) 2020 XL 2006: 2004: 2003: 1999:(706765) 2010 TK 1969:Arjuna asteroids 1931: 1927: 1912: 1908: 1893: 1889: 1858: 1808: 1794: 1792: 1786: 1782: 1780: 1774: 1770: 1768: 1762: 1760: 1754: 1752: 1746: 1744: 1738: 1737: 1736: 1644:Yarkovsky effect 1560:thermal infrared 1549:S-type asteroids 1544:opposition surge 1423:predicted impact 1398: 1227: 1216: 1188: 1186: 1185: 1174: 1172: 1171: 1167:(144898) 2004 VD 1160: 1145: 1136: 1123: 1115: 1113: 1112: 1108:(163132) 2002 CU 1051: 1049: 1048: 993: 991: 990: 836: 834: 833: 821: 819: 818: 803: 801: 800: 764: 720:upper atmosphere 653: 643: 625: 623: 622: 618:(308635) 2005 YU 610: 608: 607: 583: 557:sungrazing comet 553:P/1999 J6 (SOHO) 527:Close approaches 366: 365: 356: 355: 231: 221: 211: 201: 191: 174: 162: 100: 84: 76: 62: 60: 59: 55:(388188) 2006 DP 49: 32: 31: 21: 13715: 13714: 13710: 13709: 13708: 13706: 13705: 13704: 13675: 13674: 13673: 13661: 13651: 13649: 13639: 13637: 13625: 13617: 13615: 13610: 13604: 13602: 13601: 13595: 13588: 13581: 13574: 13568: 13562: 13556: 13549: 13542: 13535: 13528: 13521: 13514: 13499: 13497: 13487: 13485: 13475: 13473: 13460: 13451: 13415: 13352: 13336:vs. Hill sphere 13262:Molecular cloud 13190:Sample curation 13170:Detached object 13109: 13102: 12946: 12938: 12875: 12862: 12807:Neptune trojans 12590: 12588: 12586: 12579: 12521: 12214: 12085: 12067: 11953: 11916: 11909: 11904: 11874: 11869: 11843: 11781: 11722: 11674: 11632: 11627: 11597: 11592: 11566: 11557: 11532: 11493:B612 Foundation 11481: 11387: 11260: 11224:Gravity tractor 11202: 11136: 11131: 11101: 11096: 11035: 11019:Meteorite falls 10982: 10939: 10920: 10914: 10910: 10903: 10899: 10892: 10888: 10881: 10877: 10870: 10866: 10755: 10751: 10729: 10645: 10640: 10610: 10605: 10575: 10542: 10504: 10463: 10314: 10194: 10155: 10134:Uranus-crossers 10129:Saturn-crossers 10032:Neptune trojans 10022:Jupiter trojans 9988: 9898: 9893: 9859: 9848: 9842: 9831: 9790: 9785: 9775: 9773: 9758: 9754: 9744: 9742: 9732: 9728: 9718: 9716: 9706: 9705: 9701: 9691: 9689: 9679: 9675: 9665: 9663: 9653: 9649: 9639: 9637: 9624: 9623: 9619: 9609: 9607: 9590: 9583: 9573: 9571: 9561: 9557: 9547: 9545: 9535: 9531: 9521: 9519: 9514: 9513: 9509: 9499: 9497: 9487: 9483: 9466: 9462: 9452: 9450: 9438: 9434: 9424: 9422: 9407: 9403: 9393: 9391: 9376: 9372: 9362: 9360: 9353:Spaceflight Now 9345: 9341: 9331: 9329: 9320: 9319: 9315: 9284: 9280: 9270: 9268: 9259: 9258: 9254: 9244: 9242: 9227: 9223: 9213: 9211: 9202: 9201: 9197: 9187: 9185: 9176: 9175: 9171: 9161: 9159: 9154: 9153: 9149: 9139: 9137: 9120: 9107: 9097: 9095: 9080: 9076: 9066: 9064: 9045: 9041: 9018: 9014: 8995: 8991: 8981: 8979: 8975: 8969: 8968: 8961: 8951: 8949: 8938: 8934: 8924: 8922: 8903: 8899: 8876:(5). part 193. 8862: 8858: 8848: 8846: 8839: 8835: 8825: 8823: 8813: 8809: 8762: 8755: 8745: 8743: 8733: 8729: 8719: 8717: 8698: 8694: 8684: 8682: 8645: 8639: 8630: 8620: 8618: 8608: 8604: 8551: 8547: 8542: 8535: 8525: 8523: 8476: 8470: 8466: 8456: 8454: 8445:Snowder, Brad. 8443: 8439: 8429: 8427: 8423: 8384: 8378: 8374: 8364: 8362: 8352: 8348: 8338: 8336: 8319: 8318: 8314: 8304: 8302: 8263: 8257: 8246: 8236: 8234: 8186: 8182: 8178: 8175: 8171: 8166: 8159: 8149: 8147: 8109: 8105: 8100: 8087: 8077: 8075: 8046: 8040: 8036: 8026: 8024: 8013: 8006: 7996: 7994: 7989: 7988: 7984: 7974: 7972: 7962: 7958: 7948: 7946: 7925: 7919: 7915: 7861: 7854: 7850: 7840: 7838: 7833: 7832: 7828: 7818: 7816: 7811: 7810: 7806: 7796: 7794: 7790: 7741: 7735: 7726: 7716: 7714: 7697: 7693: 7683: 7681: 7671: 7667: 7620: 7616: 7569: 7565: 7555: 7553: 7538: 7534: 7524: 7522: 7512: 7508: 7498: 7496: 7487: 7486: 7482: 7472: 7470: 7461: 7460: 7456: 7446: 7444: 7429: 7425: 7415: 7413: 7408: 7407: 7403: 7380: 7376: 7335: 7331: 7315:10.1.1.603.7624 7290: 7286: 7249: 7245: 7235: 7233: 7206: 7200: 7196: 7186: 7184: 7178:"Why Infrared?" 7176: 7175: 7168: 7158: 7156: 7151: 7150: 7143: 7133: 7131: 7099: 7082: 7072: 7070: 7060: 7053: 7014: 7005: 6995: 6993: 6988: 6987: 6983: 6973: 6971: 6958: 6957: 6948: 6938: 6936: 6927: 6926: 6917: 6884: 6880: 6870: 6868: 6863: 6862: 6858: 6848: 6846: 6831: 6827: 6817: 6815: 6798: 6794: 6784: 6782: 6765: 6761: 6751: 6749: 6745: 6738: 6732: 6728: 6718: 6716: 6711: 6710: 6706: 6696: 6694: 6689: 6688: 6684: 6635: 6624: 6616:See especially 6609: 6607: 6597: 6593: 6542: 6535: 6525: 6523: 6508: 6501: 6491: 6489: 6482: 6475: 6465: 6463: 6452: 6451: 6442: 6432: 6430: 6426: 6413: 6409: 6408: 6404: 6394: 6392: 6377: 6373: 6363: 6361: 6351: 6347: 6337: 6335: 6320:Morrison, David 6317: 6313: 6303: 6301: 6292: 6291: 6287: 6277: 6275: 6268: 6264: 6254: 6252: 6245: 6241: 6231: 6229: 6222: 6218: 6169: 6165: 6155: 6153: 6110: 6104: 6100: 6090: 6088: 6083: 6082: 6075: 6065: 6063: 6058: 6057: 6053: 6043: 6041: 6032: 6031: 6022: 6012: 6010: 5991: 5987: 5977: 5975: 5966: 5965: 5961: 5951: 5949: 5934: 5930: 5920: 5918: 5909: 5908: 5889: 5879: 5877: 5868: 5867: 5863: 5832: 5828: 5818: 5816: 5807: 5806: 5799: 5789: 5787: 5771: 5767: 5757: 5755: 5736: 5732: 5722: 5720: 5703: 5699: 5689: 5687: 5680: 5667: 5657: 5655: 5640: 5636: 5626: 5624: 5607: 5603: 5593: 5591: 5589:Meteoroides.NET 5583: 5582: 5578: 5568: 5566: 5561: 5560: 5556: 5546: 5544: 5529: 5522: 5507: 5477: 5473: 5463: 5461: 5452: 5451: 5444: 5405: 5394: 5384: 5382: 5373: 5372: 5368: 5358: 5356: 5344: 5340: 5331: 5329: 5319: 5315: 5305: 5303: 5299: 5266: 5262: 5258: 5253: 5249: 5194: 5190: 5151: 5147: 5132: 5128: 5118: 5116: 5101: 5094: 5083: 5081: 5070: 5066: 5056: 5054: 5034:The Observatory 5025: 5016: 5006: 5004: 4957: 4951: 4947: 4937: 4935: 4911:(6458): 33–40. 4900: 4894: 4890: 4880: 4878: 4848: 4844: 4834: 4832: 4808: 4804: 4794: 4792: 4777: 4776: 4772: 4762: 4760: 4747: 4743: 4738: 4734: 4724: 4722: 4703: 4699: 4689: 4687: 4682: 4681: 4677: 4667: 4665: 4653: 4649: 4639: 4637: 4628: 4627: 4620: 4610: 4608: 4603: 4602: 4595: 4562: 4558: 4548: 4546: 4526: 4517: 4468: 4464: 4423: 4419: 4409: 4407: 4402: 4401: 4397: 4387: 4385: 4372: 4371: 4364: 4354: 4352: 4347: 4346: 4342: 4332: 4330: 4292: 4288: 4278: 4276: 4271: 4270: 4259: 4249: 4247: 4242: 4241: 4237: 4211: 4207: 4197: 4195: 4163: 4159: 4149: 4147: 4140: 4124: 4120: 4110: 4108: 4095: 4091: 4081: 4079: 4074: 4073: 4064: 4054: 4052: 4042: 4033: 3974: 3970: 3960: 3958: 3954: 3927: 3921: 3900: 3890: 3888: 3883: 3882: 3873: 3863: 3861: 3853: 3852: 3841: 3831: 3829: 3817: 3810: 3800: 3798: 3787: 3780: 3770: 3768: 3753: 3746: 3736: 3734: 3719: 3712: 3702: 3700: 3689: 3678: 3668: 3666: 3649: 3640: 3630: 3628: 3613: 3606: 3596: 3594: 3579: 3572: 3562: 3560: 3545: 3538: 3528: 3526: 3514: 3507: 3497: 3495: 3478: 3471: 3461: 3459: 3455: 3449: 3448: 3433: 3419: 3417: 3400: 3387: 3377: 3375: 3358: 3351: 3341: 3339: 3322: 3315: 3305: 3303: 3299: 3292: 3288: 3287: 3280: 3270: 3268: 3259: 3258: 3249: 3239: 3237: 3228: 3227: 3218: 3208: 3206: 3189: 3174: 3115: 3111: 3101: 3099: 3084: 3080: 3047: 3040: 3030: 3028: 3023: 3022: 3005: 2995: 2993: 2988: 2987: 2966: 2962: 2957: 2903: 2783: 2771:M-type asteroid 2739: 2727: 2726: 2723: 2688: 2659: 2644: 2631: 2630: 2627: 2620: 2619: 2618:(98943) 2001 CC 2616: 2597: 2500:Tucson, Arizona 2460: 2447: 2441: 2408: 2404: 2401: 2397: 2373: 2370: 2366: 2363: 2359: 2352: 2348: 2302: 2235: 2219: 2203: 2202: 2199: 2192: 2191: 2188: 2181: 2180: 2177: 2170: 2169: 2166: 2160: 2145: 2144: 2134: 2133: 2125: 2121: 2117: 2116: 2115: 2108: 2107: 2104: 2093:compound orbits 2082: 2081: 2078: 2071: 2070: 2067: 2039: 2038: 2035: 2012: 2011: 2008: 2001: 2000: 1997: 1949: 1929: 1925: 1911:q < 1.017 AU 1910: 1906: 1892:Q > 0.983 AU 1891: 1887: 1857:Q < 0.983 AU 1856: 1831:semi-major axis 1819: 1807: 1803: 1790: 1788: 1784: 1778: 1776: 1772: 1766: 1764: 1758: 1756: 1750: 1748: 1742: 1740: 1734: 1732: 1731: 1729: 1688: 1588: 1508: 1480:asteroid family 1437: 1418: 1399: 1386: 1381: 1301: 1244: 1243: 1242: 1241: 1230: 1229: 1228: 1219: 1218: 1217: 1206: 1200: 1183: 1182: 1179: 1169: 1168: 1165: 1159: 1155: 1143:(29075) 1950 DA 1141: 1134:(29075) 1950 DA 1132: 1122: 1118: 1110: 1109: 1106: 1105:In March 2002, 1084: 1046: 1045: 1042: 1020: 988: 987: 986:(35396) 1997 XF 984: 970:megatons of TNT 897:lunar distances 881: 875: 831: 830: 827: 816: 815: 812: 798: 797: 794: 774: 773: 772: 770: 765: 716: 710: 704: 684:Rocky Mountains 668: 663: 662: 661: 659: 654: 642: 638: 628:lunar distances 620: 619: 616: 605: 604: 601: 579: 535: 529: 520: 500:Denison Olmsted 443: 372:alternate image 363: 361: 353: 351: 340: 332:asteroid mining 240: 239: 238: 237: 229: 227: 219: 217: 216:: 2,744 (7.90%) 209: 207: 199: 197: 189: 123:Characteristics 118: 117: 116: 115: 114: 101: 92: 91: 90: 85:as seen by the 80: 77: 69: 68: 57: 56: 53: 52:Radar image of 50: 28: 23: 22: 15: 12: 11: 5: 13713: 13703: 13702: 13697: 13692: 13687: 13672: 13671: 13659: 13647: 13635: 13612: 13611: 13508: 13507: 13495: 13483: 13471: 13465: 13462: 13461: 13457: 13456: 13453: 13452: 13450: 13449: 13444: 13439: 13434: 13429: 13423: 13421: 13417: 13416: 13414: 13413: 13408: 13407: 13406: 13401: 13391: 13386: 13381: 13376: 13371: 13366: 13360: 13358: 13354: 13353: 13351: 13350: 13348:Scattered disc 13345: 13340: 13339: 13338: 13328: 13323: 13322: 13321: 13316: 13315: 13314: 13304: 13299: 13294: 13289: 13279: 13274: 13269: 13264: 13259: 13254: 13249: 13244: 13239: 13234: 13229: 13224: 13219: 13214: 13209: 13204: 13199: 13198: 13197: 13192: 13182: 13177: 13172: 13167: 13162: 13157: 13152: 13147: 13142: 13137: 13136: 13135: 13133:Excretion disk 13128:Accretion disk 13125: 13120: 13118:Star formation 13114: 13112: 13104: 13103: 13101: 13100: 13095: 13090: 13085: 13080: 13075: 13070: 13065: 13064: 13063: 13053: 13048: 13043: 13042: 13041: 13031: 13026: 13021: 13020: 13019: 13014: 13009: 13007:space stations 12999: 12998: 12997: 12992: 12982: 12981: 12980: 12975: 12970: 12960: 12954: 12952: 12940: 12939: 12937: 12936: 12931: 12926: 12921: 12916: 12911: 12906: 12901: 12896: 12891: 12886: 12880: 12878: 12867: 12864: 12863: 12861: 12860: 12855: 12854: 12853: 12848: 12846:Scattered disc 12843: 12838: 12833: 12832: 12831: 12826: 12811: 12810: 12809: 12804: 12794: 12793: 12792: 12787: 12782: 12777: 12772: 12767: 12762: 12757: 12752: 12742: 12737: 12732: 12731: 12730: 12725: 12720: 12715: 12714: 12713: 12708: 12698: 12693: 12688: 12678: 12677: 12676: 12671: 12666: 12661: 12656: 12651: 12646: 12641: 12633: 12628: 12627: 12626: 12621: 12611: 12606: 12601: 12595: 12593: 12581: 12580: 12578: 12577: 12572: 12567: 12562: 12557: 12552: 12547: 12537: 12531: 12529: 12523: 12522: 12520: 12519: 12518: 12517: 12507: 12506: 12505: 12495: 12494: 12493: 12483: 12482: 12481: 12471: 12470: 12469: 12464: 12454: 12453: 12452: 12447: 12442: 12437: 12432: 12422: 12421: 12420: 12410: 12409: 12408: 12403: 12398: 12393: 12383: 12382: 12381: 12376: 12371: 12366: 12361: 12356: 12346: 12345: 12344: 12339: 12334: 12329: 12324: 12319: 12314: 12309: 12304: 12299: 12289: 12288: 12287: 12282: 12277: 12272: 12267: 12257: 12256: 12255: 12250: 12240: 12239: 12238: 12233: 12224: 12222: 12216: 12215: 12213: 12212: 12211: 12210: 12205: 12200: 12195: 12190: 12185: 12180: 12175: 12170: 12160: 12159: 12158: 12157: 12156: 12151: 12141: 12140: 12139: 12134: 12119: 12118: 12117: 12112: 12107: 12102: 12091: 12089: 12072: 12069: 12068: 12066: 12065: 12058: 12051: 12044: 12037: 12030: 12023: 12016: 12009: 12004: 11999: 11994: 11989: 11982: 11977: 11972: 11967: 11962: 11914: 11911: 11910: 11903: 11902: 11895: 11888: 11880: 11871: 11870: 11868: 11867: 11862: 11857: 11851: 11849: 11845: 11844: 11842: 11841: 11836: 11831: 11829:Near-parabolic 11826: 11821: 11816: 11811: 11806: 11801: 11795: 11793: 11787: 11786: 11783: 11782: 11780: 11779: 11778: 11777: 11775:Scattered disc 11772: 11767: 11762: 11752: 11747: 11746: 11745: 11743:Neptune trojan 11740: 11732: 11730: 11724: 11723: 11721: 11720: 11718:Spectral types 11715: 11710: 11708:Jupiter trojan 11705: 11700: 11695: 11690: 11684: 11682: 11676: 11675: 11673: 11672: 11667: 11662: 11657: 11652: 11646: 11640: 11634: 11633: 11626: 11625: 11618: 11611: 11603: 11594: 11593: 11591: 11590: 11585: 11580: 11574: 11572: 11568: 11567: 11565: 11564: 11559: 11555: 11551: 11546: 11540: 11538: 11534: 11533: 11531: 11530: 11525: 11520: 11515: 11510: 11505: 11500: 11495: 11489: 11487: 11483: 11482: 11480: 11479: 11474: 11469: 11464: 11459: 11454: 11449: 11444: 11439: 11434: 11429: 11424: 11419: 11414: 11409: 11404: 11398: 11396: 11389: 11388: 11386: 11385: 11378: 11377: 11376: 11362: 11357: 11352: 11345: 11340: 11337:NEAR Shoemaker 11333: 11332: 11331: 11319: 11312: 11307: 11306: 11305: 11298: 11288: 11283: 11276: 11268: 11266: 11262: 11261: 11259: 11258: 11257: 11256: 11251: 11245:Damage scales 11243: 11238: 11233: 11232: 11231: 11226: 11221: 11210: 11208: 11204: 11203: 11201: 11200: 11195: 11190: 11185: 11180: 11175: 11170: 11165: 11160: 11155: 11150: 11144: 11142: 11138: 11137: 11130: 11129: 11122: 11115: 11107: 11098: 11097: 11095: 11094: 11089: 11084: 11079: 11074: 11069: 11064: 11059: 11054: 11049: 11043: 11041: 11037: 11036: 11034: 11033: 11028: 11023: 11022: 11021: 11016: 11006: 11001: 10996: 10990: 10988: 10984: 10983: 10981: 10980: 10978:Jupiter impact 10974: 10972:Jupiter impact 10968: 10966:Jupiter impact 10962: 10956: 10950: 10948: 10941: 10940: 10935: 10933: 10926: 10925: 10922: 10921: 10919: 10918: 10912: 10907: 10901: 10896: 10890: 10885: 10879: 10874: 10868: 10863: 10857: 10852: 10850:2019 MO impact 10847: 10841: 10839:2018 LA impact 10836: 10831: 10829:WT1190F impact 10826: 10821: 10816: 10811: 10809:2014 AA impact 10806: 10800: 10799: 10798: 10787: 10781: 10776: 10770: 10765: 10759: 10753: 10748: 10743: 10737: 10735: 10731: 10730: 10728: 10727: 10721: 10715: 10709: 10703: 10701:Chicora meteor 10697: 10691: 10685: 10679: 10673: 10667: 10660: 10658: 10651: 10647: 10646: 10639: 10638: 10631: 10624: 10616: 10607: 10606: 10604: 10603: 10592: 10591: 10586: 10580: 10577: 10576: 10574: 10573: 10572: 10571: 10561: 10556: 10550: 10548: 10544: 10543: 10541: 10540: 10538:Space missions 10535: 10530: 10525: 10520: 10514: 10512: 10506: 10505: 10503: 10502: 10497: 10492: 10487: 10481: 10479: 10473: 10472: 10469: 10468: 10465: 10464: 10462: 10461: 10460: 10459: 10454: 10449: 10444: 10439: 10429: 10428: 10427: 10424: 10421: 10418: 10407: 10406: 10405: 10404: 10401: 10398: 10395: 10392: 10389: 10384: 10379: 10374: 10369: 10364: 10354: 10353: 10352: 10349: 10346: 10343: 10340: 10335: 10324: 10322: 10316: 10315: 10313: 10312: 10311: 10310: 10305: 10300: 10295: 10290: 10285: 10280: 10269: 10268: 10267: 10266: 10261: 10256: 10246: 10241: 10240: 10239: 10234: 10229: 10224: 10213: 10211: 10202: 10196: 10195: 10193: 10192: 10185: 10180: 10174: 10172: 10163: 10161:Classification 10157: 10156: 10154: 10153: 10148: 10143: 10142: 10141: 10136: 10131: 10126: 10115: 10114: 10113: 10108: 10098: 10097: 10096: 10088: 10087: 10086: 10084:Earth-crossers 10081: 10076: 10071: 10066: 10056: 10055: 10054: 10052:Venus-crossers 10049: 10044: 10036: 10035: 10034: 10029: 10027:Uranus trojans 10024: 10019: 10014: 10009: 9998: 9996: 9990: 9989: 9987: 9986: 9984:Contact binary 9981: 9976: 9971: 9966: 9965: 9964: 9959: 9949: 9944: 9939: 9934: 9929: 9924: 9923: 9922: 9920:dynamic method 9912: 9906: 9904: 9900: 9899: 9892: 9891: 9884: 9877: 9869: 9863: 9862: 9845: 9828: 9822: 9821: 9817: 9816: 9810: 9804: 9789: 9788:External links 9786: 9784: 9783: 9752: 9726: 9699: 9673: 9647: 9617: 9581: 9555: 9529: 9507: 9481: 9460: 9432: 9401: 9370: 9339: 9313: 9294:(2): 200–225. 9278: 9252: 9221: 9195: 9169: 9147: 9105: 9094:on May 3, 2003 9074: 9039: 9012: 8989: 8959: 8932: 8897: 8856: 8833: 8807: 8753: 8727: 8692: 8628: 8602: 8549: 8533: 8464: 8437: 8372: 8346: 8312: 8244: 8200:(4): 121–133. 8184: 8173: 8157: 8121:. section A4. 8107: 8085: 8034: 8004: 7982: 7956: 7936:(1): L49–L54. 7913: 7859: 7848: 7826: 7804: 7724: 7706:Universe Today 7691: 7665: 7614: 7563: 7546:Press Releases 7532: 7506: 7480: 7454: 7423: 7401: 7390:(3): 213–216. 7374: 7347:(3): 227–233. 7329: 7300:(1): 120–134. 7284: 7243: 7217:(2): 406–427. 7194: 7166: 7141: 7129:10.1086/115267 7080: 7051: 7003: 6981: 6946: 6915: 6878: 6856: 6825: 6792: 6759: 6726: 6704: 6682: 6622: 6591: 6533: 6499: 6473: 6440: 6402: 6371: 6345: 6311: 6285: 6262: 6239: 6216: 6163: 6098: 6073: 6051: 6020: 5999:Tumbling Stone 5985: 5959: 5928: 5887: 5861: 5842:(4): 297–303. 5826: 5797: 5765: 5730: 5697: 5665: 5634: 5601: 5576: 5554: 5520: 5505: 5471: 5442: 5415:(1): 114–122. 5392: 5366: 5338: 5313: 5260: 5247: 5208:(1): L39–L43. 5188: 5145: 5126: 5092: 5064: 5041:(2): 319–322. 5014: 4970:(6): 817–840. 4945: 4888: 4862:(1): 323–328. 4842: 4824:(1): 287−288. 4802: 4770: 4745: 4732: 4697: 4675: 4647: 4618: 4593: 4556: 4515: 4462: 4435:(3): 432–435. 4417: 4395: 4362: 4340: 4320:10.1086/497374 4306:(2): 551–586. 4286: 4257: 4235: 4205: 4157: 4138: 4118: 4089: 4062: 4031: 3968: 3898: 3871: 3839: 3808: 3795:Press Releases 3778: 3744: 3710: 3697:Press Releases 3676: 3638: 3604: 3570: 3553:Press Releases 3536: 3505: 3469: 3431: 3385: 3349: 3313: 3278: 3247: 3216: 3172: 3109: 3078: 3038: 3003: 2963: 2961: 2958: 2956: 2955: 2950: 2945: 2940: 2935: 2930: 2925: 2920: 2915: 2910: 2904: 2902: 2899: 2849:and ESA probe 2782: 2779: 2751:mine asteroids 2738: 2735: 2658: 2655: 2536:NEAR Shoemaker 2473:NEAR Shoemaker 2459: 2456: 2440: 2437: 2406: 2399: 2368: 2361: 2350: 2301: 2298: 2290:Halley's Comet 2288:Before AD 837 2253:Tunguska event 2242:Halley's Comet 2234: 2231: 2227:Tunguska event 2218: 2215: 2211: 2210: 2123: 2097: 2096: 2089: 2050: 2019: 1948: 1945: 1934: 1933: 1928:. In summary, 1915: 1914: 1896: 1895: 1877: 1876: 1861:ꞌAylóꞌchaxnims 1841:distance (Q): 1818: 1815: 1805: 1687: 1684: 1656:extinct comets 1587: 1584: 1507: 1504: 1484:meteor showers 1436: 1433: 1384: 1295: 1268:conference in 1232: 1231: 1222: 1221: 1220: 1211: 1210: 1209: 1208: 1207: 1202:Main article: 1199: 1196: 1157: 1120: 1083: 1080: 1067: 1066: 1063: 1060: 1057: 1019: 1016: 966:4581 Asclepius 874: 871: 767: 766: 759: 758: 757: 752:Tunguska event 732:impact craters 706:Main article: 703: 700: 667: 664: 656: 655: 648: 647: 646: 640: 598:#Earth-grazers 544:Lexell's Comet 531:Main article: 528: 525: 519: 516: 498:by astronomer 485:Halley's Comet 466:NEAR Shoemaker 451:Halley's Comet 442: 439: 339: 336: 228: 218: 208: 198: 188: 184: 183: 182: 179: 178: 167: 166: 164:Media category 155: 154: 153:External links 150: 149: 139: 135: 134: 129: 125: 124: 120: 119: 102: 95: 94: 93: 78: 71: 70: 63:recorded by a 51: 44: 43: 42: 41: 40: 37: 36: 26: 9: 6: 4: 3: 2: 13712: 13701: 13700:Space hazards 13698: 13696: 13693: 13691: 13688: 13686: 13683: 13682: 13680: 13670: 13665: 13660: 13658: 13648: 13646: 13636: 13634: 13629: 13624: 13623: 13620: 13609: 13600: 13593: 13586: 13579: 13573: 13567: 13561: 13554: 13547: 13540: 13533: 13526: 13519: 13512: 13506: 13496: 13494: 13484: 13482: 13472: 13470: 13467: 13466: 13463: 13448: 13447:Tidal locking 13445: 13443: 13440: 13438: 13435: 13433: 13430: 13428: 13427:Double planet 13425: 13424: 13422: 13418: 13412: 13409: 13405: 13402: 13400: 13397: 13396: 13395: 13392: 13390: 13387: 13385: 13382: 13380: 13379:Minor planets 13377: 13375: 13372: 13370: 13367: 13365: 13362: 13361: 13359: 13355: 13349: 13346: 13344: 13341: 13337: 13334: 13333: 13332: 13329: 13327: 13324: 13320: 13317: 13313: 13312:Merging stars 13310: 13309: 13308: 13305: 13303: 13300: 13298: 13295: 13293: 13290: 13288: 13285: 13284: 13283: 13280: 13278: 13275: 13273: 13270: 13268: 13265: 13263: 13260: 13258: 13255: 13253: 13250: 13248: 13245: 13243: 13240: 13238: 13235: 13233: 13230: 13228: 13225: 13223: 13220: 13218: 13215: 13213: 13210: 13208: 13205: 13203: 13200: 13196: 13193: 13191: 13188: 13187: 13186: 13183: 13181: 13178: 13176: 13173: 13171: 13168: 13166: 13163: 13161: 13158: 13156: 13153: 13151: 13148: 13146: 13143: 13141: 13138: 13134: 13131: 13130: 13129: 13126: 13124: 13121: 13119: 13116: 13115: 13113: 13111: 13105: 13099: 13096: 13094: 13091: 13089: 13086: 13084: 13081: 13079: 13076: 13074: 13071: 13069: 13066: 13062: 13059: 13058: 13057: 13054: 13052: 13049: 13047: 13044: 13040: 13037: 13036: 13035: 13032: 13030: 13027: 13025: 13022: 13018: 13015: 13013: 13010: 13008: 13005: 13004: 13003: 13000: 12996: 12993: 12991: 12988: 12987: 12986: 12983: 12979: 12976: 12974: 12971: 12969: 12966: 12965: 12964: 12961: 12959: 12956: 12955: 12953: 12950: 12945: 12941: 12935: 12932: 12930: 12927: 12925: 12922: 12920: 12917: 12915: 12914:Subsatellites 12912: 12910: 12907: 12905: 12902: 12900: 12897: 12895: 12892: 12890: 12887: 12885: 12882: 12881: 12879: 12877: 12874:Hypothetical 12871: 12868: 12859: 12856: 12852: 12849: 12847: 12844: 12842: 12839: 12837: 12834: 12830: 12827: 12825: 12822: 12821: 12820: 12817: 12816: 12815: 12812: 12808: 12805: 12803: 12800: 12799: 12798: 12795: 12791: 12788: 12786: 12783: 12781: 12778: 12776: 12773: 12771: 12768: 12766: 12763: 12761: 12758: 12756: 12753: 12751: 12748: 12747: 12746: 12743: 12741: 12740:Asteroid belt 12738: 12736: 12733: 12729: 12726: 12724: 12721: 12719: 12716: 12712: 12709: 12707: 12704: 12703: 12702: 12699: 12697: 12694: 12692: 12689: 12687: 12684: 12683: 12682: 12679: 12675: 12672: 12670: 12667: 12665: 12662: 12660: 12657: 12655: 12652: 12650: 12647: 12645: 12642: 12640: 12637: 12636: 12634: 12632: 12629: 12625: 12622: 12620: 12617: 12616: 12615: 12614:Minor planets 12612: 12610: 12607: 12605: 12602: 12600: 12597: 12596: 12594: 12592: 12582: 12576: 12573: 12571: 12568: 12566: 12563: 12561: 12558: 12556: 12553: 12551: 12548: 12545: 12541: 12538: 12536: 12533: 12532: 12530: 12528: 12524: 12516: 12513: 12512: 12511: 12508: 12504: 12501: 12500: 12499: 12496: 12492: 12489: 12488: 12487: 12484: 12480: 12477: 12476: 12475: 12472: 12468: 12465: 12463: 12460: 12459: 12458: 12455: 12451: 12448: 12446: 12443: 12441: 12438: 12436: 12433: 12431: 12428: 12427: 12426: 12423: 12419: 12416: 12415: 12414: 12411: 12407: 12404: 12402: 12399: 12397: 12394: 12392: 12389: 12388: 12387: 12384: 12380: 12377: 12375: 12372: 12370: 12367: 12365: 12362: 12360: 12357: 12355: 12352: 12351: 12350: 12347: 12343: 12340: 12338: 12335: 12333: 12330: 12328: 12325: 12323: 12320: 12318: 12315: 12313: 12310: 12308: 12305: 12303: 12300: 12298: 12295: 12294: 12293: 12290: 12286: 12283: 12281: 12278: 12276: 12273: 12271: 12268: 12266: 12263: 12262: 12261: 12258: 12254: 12251: 12249: 12246: 12245: 12244: 12241: 12237: 12234: 12232: 12229: 12228: 12226: 12225: 12223: 12221: 12217: 12209: 12206: 12204: 12201: 12199: 12196: 12194: 12191: 12189: 12186: 12184: 12181: 12179: 12176: 12174: 12171: 12169: 12166: 12165: 12164: 12161: 12155: 12152: 12150: 12147: 12146: 12145: 12142: 12138: 12135: 12133: 12130: 12129: 12128: 12125: 12124: 12123: 12120: 12116: 12113: 12111: 12108: 12106: 12103: 12101: 12098: 12097: 12096: 12093: 12092: 12090: 12088: 12083: 12079: 12076: 12075: 12070: 12064: 12063: 12059: 12057: 12056: 12052: 12050: 12049: 12045: 12043: 12042: 12038: 12036: 12035: 12031: 12029: 12028: 12024: 12022: 12021: 12017: 12015: 12014: 12010: 12008: 12005: 12003: 12000: 11998: 11995: 11993: 11990: 11988: 11987: 11983: 11981: 11978: 11976: 11973: 11971: 11968: 11966: 11963: 11961: 11958: 11957: 11912: 11908: 11901: 11896: 11894: 11889: 11887: 11882: 11881: 11878: 11866: 11863: 11861: 11858: 11856: 11853: 11852: 11850: 11846: 11840: 11837: 11835: 11832: 11830: 11827: 11825: 11822: 11820: 11817: 11815: 11812: 11810: 11807: 11805: 11802: 11800: 11797: 11796: 11794: 11792: 11788: 11776: 11773: 11771: 11768: 11766: 11763: 11761: 11758: 11757: 11756: 11753: 11751: 11748: 11744: 11741: 11739: 11736: 11735: 11734: 11733: 11731: 11729: 11725: 11719: 11716: 11714: 11711: 11709: 11706: 11704: 11701: 11699: 11698:Asteroid belt 11696: 11694: 11693:Aten asteroid 11691: 11689: 11686: 11685: 11683: 11681: 11677: 11671: 11668: 11666: 11663: 11661: 11658: 11656: 11653: 11651: 11648: 11647: 11644: 11641: 11639: 11638:Minor planets 11635: 11631: 11624: 11619: 11617: 11612: 11610: 11605: 11604: 11601: 11589: 11586: 11584: 11581: 11579: 11578:Impact events 11576: 11575: 11573: 11569: 11563: 11562:99942 Apophis 11560: 11558: 11552: 11550: 11547: 11545: 11542: 11541: 11539: 11535: 11529: 11526: 11524: 11521: 11519: 11516: 11514: 11511: 11509: 11506: 11504: 11501: 11499: 11496: 11494: 11491: 11490: 11488: 11486:Organizations 11484: 11478: 11475: 11473: 11470: 11468: 11465: 11463: 11460: 11458: 11455: 11453: 11450: 11448: 11445: 11443: 11442:OGS Telescope 11440: 11438: 11435: 11433: 11430: 11428: 11425: 11423: 11420: 11418: 11415: 11413: 11410: 11408: 11405: 11403: 11400: 11399: 11397: 11394: 11390: 11384: 11383: 11379: 11375: 11374: 11370: 11369: 11368: 11367: 11363: 11361: 11358: 11356: 11353: 11351: 11350: 11346: 11344: 11341: 11339: 11338: 11334: 11330: 11327: 11326: 11325: 11324: 11320: 11318: 11317: 11313: 11311: 11310:Halley Armada 11308: 11304: 11303: 11299: 11297: 11294: 11293: 11292: 11289: 11287: 11284: 11282: 11281: 11277: 11275: 11274: 11270: 11269: 11267: 11263: 11255: 11252: 11250: 11249:Palermo scale 11247: 11246: 11244: 11242: 11239: 11237: 11234: 11230: 11227: 11225: 11222: 11220: 11217: 11216: 11215: 11212: 11211: 11209: 11205: 11199: 11196: 11194: 11191: 11189: 11186: 11184: 11181: 11179: 11178:Meteor shower 11176: 11174: 11171: 11169: 11166: 11164: 11161: 11159: 11156: 11154: 11151: 11149: 11146: 11145: 11143: 11139: 11135: 11128: 11123: 11121: 11116: 11114: 11109: 11108: 11105: 11093: 11090: 11088: 11085: 11083: 11080: 11078: 11075: 11073: 11072:Meteor shower 11070: 11068: 11065: 11063: 11060: 11058: 11055: 11053: 11050: 11048: 11045: 11044: 11042: 11038: 11032: 11029: 11027: 11026:Minor planets 11024: 11020: 11017: 11015: 11012: 11011: 11010: 11007: 11005: 11002: 11000: 10997: 10995: 10992: 10991: 10989: 10985: 10979: 10975: 10973: 10969: 10967: 10963: 10961: 10957: 10955: 10952: 10951: 10949: 10947: 10942: 10938: 10934: 10932: 10927: 10917: 10908: 10906: 10897: 10895: 10886: 10884: 10875: 10873: 10864: 10862: 10858: 10856: 10853: 10851: 10848: 10846: 10842: 10840: 10837: 10835: 10832: 10830: 10827: 10825: 10822: 10820: 10817: 10815: 10812: 10810: 10807: 10805: 10801: 10797: 10794: 10793: 10792: 10788: 10786: 10785:Novato meteor 10782: 10780: 10777: 10775: 10771: 10769: 10766: 10764: 10760: 10758: 10749: 10747: 10744: 10742: 10739: 10738: 10736: 10732: 10726: 10722: 10720: 10716: 10714: 10710: 10708: 10704: 10702: 10698: 10696: 10692: 10690: 10686: 10684: 10680: 10678: 10674: 10672: 10668: 10666: 10662: 10661: 10659: 10655: 10652: 10648: 10644: 10637: 10632: 10630: 10625: 10623: 10618: 10617: 10614: 10602: 10594: 10593: 10590: 10587: 10585: 10582: 10581: 10578: 10570: 10567: 10566: 10565: 10562: 10560: 10557: 10555: 10552: 10551: 10549: 10545: 10539: 10536: 10534: 10531: 10529: 10526: 10524: 10523:Minor planets 10521: 10519: 10516: 10515: 10513: 10511: 10507: 10501: 10498: 10496: 10493: 10491: 10488: 10486: 10483: 10482: 10480: 10478: 10474: 10458: 10455: 10453: 10450: 10448: 10445: 10443: 10440: 10438: 10435: 10434: 10433: 10430: 10425: 10422: 10419: 10417: 10414: 10413: 10412: 10409: 10408: 10402: 10399: 10396: 10393: 10390: 10388: 10385: 10383: 10380: 10378: 10375: 10373: 10370: 10368: 10365: 10363: 10360: 10359: 10358: 10355: 10350: 10347: 10344: 10341: 10339: 10336: 10334: 10331: 10330: 10329: 10326: 10325: 10323: 10321: 10317: 10309: 10306: 10304: 10301: 10299: 10296: 10294: 10291: 10289: 10286: 10284: 10281: 10279: 10276: 10275: 10274: 10273:small classes 10271: 10270: 10265: 10262: 10260: 10257: 10255: 10252: 10251: 10250: 10247: 10245: 10242: 10238: 10235: 10233: 10230: 10228: 10225: 10223: 10220: 10219: 10218: 10215: 10214: 10212: 10210: 10206: 10203: 10201: 10197: 10191: 10190: 10186: 10184: 10181: 10179: 10176: 10175: 10173: 10171: 10167: 10164: 10162: 10158: 10152: 10149: 10147: 10144: 10140: 10137: 10135: 10132: 10130: 10127: 10125: 10122: 10121: 10120: 10116: 10112: 10109: 10107: 10104: 10103: 10102: 10101:Asteroid belt 10099: 10095: 10094:Mars crossers 10092: 10091: 10089: 10085: 10082: 10080: 10077: 10075: 10072: 10070: 10067: 10065: 10062: 10061: 10060: 10057: 10053: 10050: 10048: 10045: 10043: 10040: 10039: 10037: 10033: 10030: 10028: 10025: 10023: 10020: 10018: 10015: 10013: 10012:Earth trojans 10010: 10008: 10005: 10004: 10003: 10000: 9999: 9997: 9995: 9991: 9985: 9982: 9980: 9977: 9975: 9974:Asteroid pair 9972: 9970: 9967: 9963: 9960: 9958: 9955: 9954: 9953: 9950: 9948: 9945: 9943: 9942:Earth-crosser 9940: 9938: 9935: 9933: 9930: 9928: 9925: 9921: 9918: 9917: 9916: 9913: 9911: 9908: 9907: 9905: 9901: 9897: 9890: 9885: 9883: 9878: 9876: 9871: 9870: 9867: 9858: 9854: 9852: 9846: 9841: 9837: 9835: 9829: 9827: 9824: 9823: 9819: 9818: 9814: 9811: 9808: 9805: 9803: 9799: 9795: 9792: 9791: 9771: 9767: 9763: 9756: 9741: 9737: 9730: 9715: 9714: 9709: 9703: 9688: 9684: 9677: 9662: 9658: 9651: 9635: 9631: 9627: 9621: 9605: 9601: 9600: 9595: 9588: 9586: 9570: 9566: 9559: 9544: 9540: 9533: 9517: 9511: 9496: 9492: 9485: 9477: 9473: 9472: 9464: 9449: 9448: 9443: 9436: 9420: 9416: 9412: 9405: 9389: 9385: 9381: 9374: 9358: 9354: 9350: 9343: 9327: 9323: 9317: 9309: 9305: 9301: 9297: 9293: 9289: 9282: 9266: 9262: 9256: 9240: 9236: 9235:New Scientist 9232: 9225: 9209: 9205: 9199: 9183: 9179: 9173: 9157: 9151: 9135: 9131: 9130: 9125: 9118: 9116: 9114: 9112: 9110: 9093: 9089: 9085: 9078: 9062: 9058: 9054: 9050: 9043: 9035: 9031: 9027: 9023: 9016: 9008: 9004: 9000: 8993: 8974: 8973: 8966: 8964: 8947: 8943: 8936: 8920: 8916: 8912: 8908: 8901: 8892: 8887: 8883: 8879: 8875: 8871: 8867: 8860: 8844: 8837: 8822: 8818: 8811: 8802: 8797: 8793: 8789: 8784: 8779: 8775: 8771: 8767: 8760: 8758: 8742: 8738: 8731: 8715: 8711: 8707: 8703: 8696: 8681: 8677: 8673: 8669: 8664: 8659: 8655: 8651: 8644: 8637: 8635: 8633: 8617: 8613: 8606: 8598: 8594: 8589: 8584: 8580: 8576: 8571: 8566: 8562: 8558: 8554: 8540: 8538: 8522: 8518: 8513: 8508: 8504: 8500: 8495: 8490: 8486: 8482: 8475: 8468: 8452: 8448: 8441: 8422: 8418: 8414: 8410: 8409:10.1038/42662 8406: 8402: 8398: 8394: 8390: 8383: 8376: 8361: 8357: 8350: 8334: 8330: 8326: 8322: 8316: 8301: 8297: 8293: 8289: 8284: 8279: 8275: 8271: 8270: 8262: 8255: 8253: 8251: 8249: 8233: 8229: 8225: 8221: 8217: 8213: 8208: 8203: 8199: 8195: 8194: 8189: 8164: 8162: 8146: 8142: 8138: 8134: 8129: 8124: 8120: 8116: 8112: 8098: 8096: 8094: 8092: 8090: 8074: 8070: 8065: 8060: 8056: 8052: 8045: 8038: 8022: 8018: 8011: 8009: 7992: 7986: 7971: 7967: 7960: 7944: 7939: 7935: 7931: 7924: 7917: 7909: 7905: 7900: 7895: 7891: 7887: 7882: 7877: 7873: 7869: 7868: 7863: 7852: 7836: 7830: 7814: 7808: 7789: 7785: 7781: 7777: 7773: 7769: 7765: 7760: 7755: 7751: 7747: 7740: 7733: 7731: 7729: 7712: 7708: 7707: 7702: 7695: 7680: 7676: 7669: 7661: 7657: 7653: 7649: 7645: 7641: 7637: 7633: 7629: 7625: 7618: 7610: 7606: 7602: 7598: 7594: 7590: 7586: 7582: 7578: 7574: 7567: 7551: 7547: 7543: 7536: 7521: 7517: 7510: 7494: 7490: 7484: 7468: 7464: 7458: 7442: 7438: 7434: 7427: 7411: 7405: 7397: 7393: 7389: 7385: 7378: 7370: 7366: 7362: 7358: 7354: 7350: 7346: 7342: 7341: 7333: 7325: 7321: 7316: 7311: 7307: 7303: 7299: 7295: 7288: 7280: 7276: 7271: 7266: 7262: 7258: 7254: 7247: 7232: 7228: 7224: 7220: 7216: 7212: 7205: 7198: 7183: 7179: 7173: 7171: 7154: 7148: 7146: 7130: 7126: 7122: 7118: 7114: 7110: 7109: 7104: 7097: 7095: 7093: 7091: 7089: 7087: 7085: 7069: 7065: 7058: 7056: 7047: 7043: 7039: 7035: 7031: 7027: 7023: 7019: 7012: 7010: 7008: 6991: 6990:"About NEOCC" 6985: 6969: 6965: 6961: 6955: 6953: 6951: 6934: 6930: 6924: 6922: 6920: 6911: 6907: 6903: 6899: 6895: 6891: 6890: 6882: 6866: 6860: 6844: 6840: 6836: 6829: 6813: 6809: 6808: 6803: 6796: 6780: 6776: 6775: 6770: 6763: 6744: 6737: 6730: 6714: 6708: 6692: 6686: 6677: 6672: 6668: 6664: 6659: 6654: 6650: 6646: 6645: 6640: 6633: 6631: 6629: 6627: 6619: 6606: 6605:New Scientist 6602: 6595: 6587: 6583: 6579: 6575: 6571: 6567: 6562: 6557: 6553: 6549: 6548: 6540: 6538: 6521: 6517: 6516:New Scientist 6513: 6506: 6504: 6487: 6480: 6478: 6461: 6457: 6456: 6449: 6447: 6445: 6425: 6421: 6420: 6412: 6406: 6390: 6386: 6382: 6375: 6360: 6356: 6349: 6333: 6329: 6325: 6321: 6315: 6299: 6295: 6289: 6273: 6266: 6250: 6243: 6227: 6220: 6212: 6208: 6204: 6200: 6196: 6192: 6187: 6182: 6178: 6174: 6167: 6152: 6148: 6144: 6140: 6136: 6132: 6128: 6124: 6120: 6116: 6109: 6102: 6086: 6080: 6078: 6061: 6055: 6039: 6035: 6029: 6027: 6025: 6008: 6004: 6000: 5996: 5989: 5973: 5969: 5963: 5947: 5943: 5942:New Scientist 5939: 5932: 5916: 5912: 5906: 5904: 5902: 5900: 5898: 5896: 5894: 5892: 5875: 5871: 5865: 5857: 5853: 5849: 5845: 5841: 5837: 5830: 5814: 5810: 5804: 5802: 5786: 5782: 5778: 5777: 5769: 5753: 5749: 5748: 5742: 5734: 5718: 5714: 5713: 5708: 5701: 5685: 5678: 5676: 5674: 5672: 5670: 5653: 5649: 5645: 5638: 5622: 5618: 5617: 5612: 5605: 5590: 5586: 5580: 5564: 5558: 5542: 5538: 5534: 5527: 5525: 5516: 5512: 5508: 5502: 5498: 5494: 5490: 5486: 5482: 5475: 5459: 5455: 5449: 5447: 5438: 5434: 5430: 5426: 5422: 5418: 5414: 5410: 5403: 5401: 5399: 5397: 5380: 5376: 5370: 5355: 5354: 5349: 5342: 5328: 5324: 5317: 5298: 5293: 5288: 5284: 5280: 5276: 5272: 5265: 5251: 5243: 5239: 5234: 5229: 5225: 5221: 5216: 5211: 5207: 5203: 5199: 5192: 5183: 5178: 5174: 5170: 5166: 5162: 5161: 5156: 5149: 5141: 5137: 5130: 5114: 5110: 5106: 5099: 5097: 5079: 5075: 5068: 5052: 5048: 5044: 5040: 5036: 5035: 5030: 5023: 5021: 5019: 5003: 4999: 4994: 4993:10044/1/11554 4989: 4985: 4981: 4977: 4973: 4969: 4965: 4964: 4956: 4949: 4934: 4930: 4926: 4922: 4918: 4914: 4910: 4906: 4899: 4892: 4877: 4873: 4869: 4865: 4861: 4857: 4853: 4846: 4831: 4827: 4823: 4819: 4818: 4813: 4806: 4790: 4786: 4785: 4780: 4774: 4758: 4754: 4750: 4736: 4720: 4716: 4712: 4708: 4701: 4685: 4679: 4664: 4663: 4658: 4651: 4635: 4631: 4625: 4623: 4606: 4600: 4598: 4589: 4585: 4581: 4577: 4573: 4569: 4568: 4560: 4544: 4540: 4539: 4534: 4530: 4524: 4522: 4520: 4511: 4507: 4503: 4499: 4495: 4491: 4487: 4483: 4479: 4475: 4474: 4466: 4458: 4454: 4450: 4446: 4442: 4438: 4434: 4430: 4429: 4421: 4405: 4399: 4383: 4379: 4375: 4369: 4367: 4350: 4344: 4329: 4325: 4321: 4317: 4313: 4309: 4305: 4301: 4297: 4290: 4274: 4268: 4266: 4264: 4262: 4245: 4239: 4231: 4227: 4223: 4219: 4215: 4209: 4194: 4190: 4186: 4182: 4178: 4174: 4173: 4168: 4161: 4145: 4141: 4135: 4131: 4130: 4122: 4106: 4102: 4101: 4093: 4077: 4071: 4069: 4067: 4051: 4047: 4040: 4038: 4036: 4027: 4023: 4019: 4015: 4011: 4007: 4003: 3999: 3994: 3989: 3985: 3981: 3980: 3972: 3953: 3949: 3945: 3941: 3937: 3933: 3932:Asteroids III 3926: 3919: 3917: 3915: 3913: 3911: 3909: 3907: 3905: 3903: 3886: 3880: 3878: 3876: 3860: 3856: 3850: 3848: 3846: 3844: 3828: 3827: 3822: 3815: 3813: 3796: 3792: 3785: 3783: 3766: 3762: 3758: 3751: 3749: 3732: 3728: 3724: 3717: 3715: 3698: 3694: 3687: 3685: 3683: 3681: 3664: 3660: 3659: 3654: 3647: 3645: 3643: 3626: 3622: 3618: 3611: 3609: 3592: 3588: 3584: 3577: 3575: 3558: 3554: 3550: 3543: 3541: 3525: 3524: 3523:New Scientist 3519: 3512: 3510: 3493: 3489: 3488: 3483: 3476: 3474: 3454: 3453: 3446: 3444: 3442: 3440: 3438: 3436: 3428: 3415: 3411: 3410: 3405: 3398: 3396: 3394: 3392: 3390: 3373: 3369: 3368: 3363: 3356: 3354: 3337: 3333: 3332: 3327: 3320: 3318: 3298: 3291: 3285: 3283: 3266: 3262: 3256: 3254: 3252: 3235: 3231: 3225: 3223: 3221: 3204: 3200: 3199: 3194: 3187: 3185: 3183: 3181: 3179: 3177: 3168: 3164: 3160: 3156: 3152: 3148: 3144: 3140: 3135: 3130: 3126: 3122: 3121: 3113: 3097: 3093: 3089: 3082: 3074: 3070: 3066: 3062: 3058: 3054: 3053: 3045: 3043: 3026: 3020: 3018: 3016: 3014: 3012: 3010: 3008: 2991: 2985: 2983: 2981: 2979: 2977: 2975: 2973: 2971: 2969: 2964: 2954: 2951: 2949: 2946: 2944: 2941: 2939: 2936: 2934: 2931: 2929: 2926: 2924: 2921: 2919: 2916: 2914: 2911: 2909: 2906: 2905: 2898: 2896: 2895: 2890: 2886: 2881: 2879: 2875: 2874: 2869: 2864: 2862: 2858: 2854: 2853: 2848: 2847: 2842: 2841: 2836: 2832: 2831: 2826: 2825: 2820: 2816: 2812: 2811: 2806: 2798: 2797: 2792: 2787: 2778: 2776: 2772: 2768: 2764: 2760: 2755: 2752: 2748: 2743: 2734: 2731: 2721: 2720: 2714: 2711: 2707: 2704: 2700: 2696: 2691: 2690:65803 Didymos 2686: 2685: 2676: 2672: 2668: 2663: 2654: 2652: 2647: 2646:3200 Phaethon 2642: 2641: 2635: 2624: 2614: 2610: 2606: 2601: 2595: 2594: 2589: 2585: 2584: 2579: 2578: 2573: 2568: 2566: 2565: 2560: 2556: 2555:4179 Toutatis 2552: 2551: 2546: 2542: 2541:25143 Itokawa 2538: 2537: 2532: 2528: 2523: 2521: 2517: 2513: 2509: 2505: 2501: 2493: 2492: 2487: 2482: 2475: 2474: 2469: 2464: 2455: 2452: 2446: 2436: 2434: 2430: 2425: 2423: 2419: 2415: 2414: 2395: 2394: 2387: 2385: 2381: 2376: 2357: 2354:. The other, 2345: 2341: 2337: 2332: 2329: 2324: 2322: 2318: 2310: 2306: 2297: 2295: 2291: 2286: 2283: 2279: 2275: 2273: 2269: 2265: 2260: 2258: 2254: 2250: 2243: 2239: 2230: 2228: 2224: 2214: 2207: 2196: 2185: 2174: 2163: 2158: 2157: 2153: 2152: 2142: 2131: 2112: 2103:Animation of 2101: 2094: 2091:Asteroids on 2090: 2086: 2075: 2064: 2060: 2056: 2055: 2051: 2048: 2043: 2033: 2032:3753 Cruithne 2029: 2025: 2024: 2020: 2016: 2005: 1995: 1991: 1987: 1986: 1982: 1981: 1980: 1978: 1974: 1970: 1966: 1962: 1953: 1944: 1941: 1938: 1926:q < 1.3 AU 1923: 1922: 1917: 1916: 1907:a > 1.0 AU 1904: 1903: 1898: 1897: 1888:a < 1.0 AU 1885: 1884: 1879: 1878: 1874: 1870: 1866: 1862: 1854: 1850: 1849: 1844: 1843: 1842: 1840: 1836: 1832: 1823: 1814: 1812: 1800: 1796: 1727: 1721: 1718: 1713: 1709: 1705: 1701: 1692: 1683: 1679: 1677: 1676:3122 Florence 1673: 1669: 1664: 1662: 1657: 1652: 1650: 1645: 1641: 1640:Kirkwood gaps 1637: 1633: 1629: 1625: 1620: 1616: 1615:perturbations 1611: 1609: 1601: 1597: 1596:4179 Toutatis 1592: 1583: 1581: 1575: 1573: 1569: 1564: 1561: 1556: 1554: 1550: 1545: 1541: 1535: 1533: 1529: 1520: 1516: 1514: 1503: 1500: 1496: 1491: 1487: 1485: 1481: 1477: 1473: 1469: 1464: 1462: 1458: 1454: 1450: 1441: 1432: 1431:(see below). 1430: 1429: 1424: 1417: 1412: 1410: 1405: 1397: 1393: 1389: 1383: 1377: 1374: 1372: 1367: 1364: 1360: 1355: 1350: 1348: 1344: 1340: 1336: 1332: 1328: 1324: 1320: 1316: 1312: 1308: 1299: 1293: 1289: 1287: 1283: 1279: 1275: 1271: 1267: 1263: 1258: 1256: 1255: 1249: 1240: 1236: 1226: 1215: 1205: 1195: 1192: 1187: 1176: 1173: 1162: 1153: 1152:99942 Apophis 1148: 1144: 1135: 1129: 1125: 1114: 1103: 1101: 1097: 1093: 1089: 1079: 1076: 1072: 1064: 1061: 1058: 1055: 1054: 1053: 1050: 1040: 1032: 1027: 1023: 1015: 1013: 1009: 1008: 1003: 1002: 996: 992: 982: 978: 973: 971: 967: 963: 959: 953: 950: 949:human society 946: 941: 939: 935: 929: 927: 922: 918: 917:human society 914: 910: 906: 898: 894: 890: 889:4179 Toutatis 885: 880: 870: 867: 863: 858: 856: 852: 848: 844: 840: 839:Nubian Desert 835: 820: 809: 805: 802: 791: 787: 783: 779: 769: 763: 756: 753: 749: 745: 741: 735: 733: 729: 725: 721: 715: 709: 699: 697: 692: 687: 685: 681: 676: 674: 666:Earth-grazers 658: 652: 645: 636: 635:367943 Duende 631: 629: 624: 613: 609: 599: 595: 591: 585: 582: 577: 573: 569: 565: 560: 558: 554: 550: 545: 541: 534: 524: 515: 512: 507: 505: 501: 497: 493: 488: 486: 482: 481:Edmond Halley 478: 474: 467: 463: 458: 452: 447: 438: 436: 432: 428: 424: 420: 415: 413: 409: 405: 401: 397: 393: 389: 385: 382:(IAU) as all 381: 373: 369: 360: km (4.7 359: 349: 344: 335: 333: 327: 324: 320: 316: 315:Palermo scale 312: 307: 305: 301: 296: 292: 288: 283: 281: 277: 273: 269: 265: 261: 257: 254:orbiting the 253: 249: 245: 235: 226:: 122 (0.35%) 225: 215: 205: 195: 187: 177: 173: 168: 165: 161: 156: 151: 148: 144: 140: 136: 133: 130: 126: 121: 112: 111: 106: 99: 88: 83: 75: 66: 61: 48: 38: 33: 30: 19: 13685:Solar System 13603:Each arrow ( 13525:Local Bubble 13511:Solar System 13509: 13302:Planetesimal 13257:Kuiper cliff 12985:Space probes 12958:Colonization 12797:Kirkwood gap 12734: 12718:Saturn Moons 12631:Planetesimal 12095:Terrestrials 12060: 12053: 12046: 12039: 12032: 12025: 12018: 12011: 11984: 11907:Solar System 11865:Space debris 11712: 11549:101955 Bennu 11432:NEO Surveyor 11392: 11380: 11371: 11364: 11349:New Horizons 11347: 11335: 11321: 11314: 11301: 11278: 11271: 11265:Space probes 11254:Torino scale 11192: 11163:Impact event 11086: 10695:Curuçá River 10677:Great Meteor 10671:Great Meteor 10589:Minor planet 10554:Asteroid Day 10500:Colonization 10431: 10272: 10187: 10151:Exoasteroids 10106:Kirkwood gap 10058: 10017:Mars trojans 10007:Venus trojan 9994:Distribution 9850: 9833: 9774:. Retrieved 9765: 9755: 9743:. Retrieved 9739: 9729: 9717:. Retrieved 9711: 9702: 9690:. Retrieved 9686: 9676: 9664:. Retrieved 9660: 9650: 9638:. Retrieved 9634:the original 9629: 9620: 9608:. Retrieved 9597: 9572:. Retrieved 9568: 9558: 9546:. Retrieved 9542: 9532: 9520:. Retrieved 9510: 9498:. Retrieved 9494: 9484: 9470: 9463: 9451:. Retrieved 9445: 9435: 9423:. Retrieved 9414: 9404: 9392:. Retrieved 9383: 9373: 9361:. Retrieved 9352: 9342: 9330:. Retrieved 9316: 9291: 9287: 9281: 9269:. Retrieved 9264: 9255: 9243:. Retrieved 9234: 9224: 9212:. Retrieved 9207: 9198: 9186:. Retrieved 9181: 9172: 9160:. Retrieved 9150: 9138:. Retrieved 9127: 9098:November 14, 9096:. Retrieved 9092:the original 9087: 9077: 9065:. Retrieved 9052: 9042: 9025: 9021: 9015: 8998: 8992: 8980:. Retrieved 8971: 8950:. Retrieved 8944:. NASA/JPL. 8935: 8923:. Retrieved 8910: 8900: 8873: 8869: 8859: 8847:. Retrieved 8836: 8824:. Retrieved 8820: 8810: 8773: 8769: 8744:. Retrieved 8740: 8730: 8720:November 13, 8718:. Retrieved 8714:the original 8706:Science@NASA 8705: 8695: 8683:. Retrieved 8653: 8649: 8619:. Retrieved 8615: 8605: 8560: 8556: 8524:. Retrieved 8484: 8480: 8467: 8455:. Retrieved 8440: 8428:. Retrieved 8392: 8388: 8375: 8363:. Retrieved 8359: 8349: 8337:. Retrieved 8324: 8315: 8303:. Retrieved 8273: 8267: 8235:. Retrieved 8197: 8191: 8148:. Retrieved 8118: 8114: 8076:. Retrieved 8054: 8050: 8037: 8025:. Retrieved 8021:the original 7995:. Retrieved 7985: 7975:February 14, 7973:. Retrieved 7969: 7959: 7947:. Retrieved 7933: 7929: 7916: 7871: 7865: 7851: 7839:. Retrieved 7829: 7817:. Retrieved 7807: 7795:. Retrieved 7788:the original 7749: 7745: 7715:. Retrieved 7704: 7694: 7682:. Retrieved 7678: 7668: 7627: 7623: 7617: 7576: 7572: 7566: 7554:. Retrieved 7548:. NASA/JPL. 7545: 7535: 7525:February 21, 7523:. Retrieved 7519: 7509: 7497:. Retrieved 7492: 7483: 7471:. Retrieved 7466: 7457: 7445:. Retrieved 7436: 7426: 7414:. Retrieved 7404: 7387: 7383: 7377: 7344: 7338: 7332: 7297: 7293: 7287: 7260: 7256: 7246: 7234:. Retrieved 7214: 7210: 7197: 7185:. Retrieved 7157:. Retrieved 7132:. Retrieved 7112: 7106: 7071:. Retrieved 7067: 7021: 7017: 6994:. Retrieved 6984: 6972:. Retrieved 6937:. Retrieved 6893: 6887: 6881: 6869:. Retrieved 6859: 6847:. Retrieved 6838: 6828: 6816:. Retrieved 6805: 6795: 6783:. Retrieved 6772: 6762: 6750:. Retrieved 6729: 6717:. Retrieved 6707: 6695:. Retrieved 6685: 6648: 6642: 6608:. Retrieved 6604: 6594: 6551: 6545: 6524:. Retrieved 6515: 6490:. Retrieved 6464:. Retrieved 6460:the original 6454: 6433:November 15, 6431:. Retrieved 6424:the original 6417: 6405: 6393:. Retrieved 6384: 6374: 6362:. Retrieved 6358: 6348: 6338:November 10, 6336:. Retrieved 6332:the original 6327: 6314: 6302:. Retrieved 6297: 6288: 6276:. Retrieved 6265: 6253:. Retrieved 6242: 6230:. Retrieved 6219: 6176: 6172: 6166: 6154:. Retrieved 6118: 6114: 6101: 6089:. Retrieved 6064:. Retrieved 6054: 6042:. Retrieved 6011:. Retrieved 5998: 5988: 5978:February 18, 5976:. Retrieved 5971: 5962: 5950:. Retrieved 5941: 5931: 5919:. Retrieved 5880:February 21, 5878:. Retrieved 5864: 5839: 5835: 5829: 5819:February 21, 5817:. Retrieved 5790:February 22, 5788:. Retrieved 5775: 5768: 5756:. Retrieved 5745: 5733: 5721:. Retrieved 5710: 5700: 5688:. Retrieved 5656:. Retrieved 5647: 5637: 5625:. Retrieved 5616:The Guardian 5614: 5604: 5592:. Retrieved 5588: 5579: 5567:. Retrieved 5557: 5545:. Retrieved 5536: 5480: 5474: 5462:. Retrieved 5412: 5408: 5383:. Retrieved 5369: 5357:. Retrieved 5351: 5341: 5330:. Retrieved 5326: 5316: 5304:. Retrieved 5274: 5270: 5250: 5205: 5201: 5191: 5164: 5158: 5148: 5139: 5129: 5117:. Retrieved 5108: 5082:. Retrieved 5067: 5055:. Retrieved 5038: 5032: 5005:. Retrieved 4967: 4961: 4948: 4936:. Retrieved 4908: 4904: 4891: 4879:. Retrieved 4859: 4855: 4845: 4835:February 18, 4833:. Retrieved 4821: 4815: 4805: 4793:. Retrieved 4782: 4773: 4761:. Retrieved 4752: 4735: 4723:. Retrieved 4710: 4700: 4688:. Retrieved 4678: 4666:. Retrieved 4660: 4650: 4638:. Retrieved 4609:. Retrieved 4571: 4565: 4559: 4547:. Retrieved 4536: 4477: 4471: 4465: 4432: 4426: 4420: 4408:. Retrieved 4398: 4386:. Retrieved 4353:. Retrieved 4343: 4331:. Retrieved 4303: 4299: 4289: 4277:. Retrieved 4248:. Retrieved 4238: 4221: 4217: 4214:Scholl, Hans 4208: 4198:February 21, 4196:. Retrieved 4176: 4170: 4160: 4148:. Retrieved 4128: 4121: 4109:. Retrieved 4099: 4092: 4080:. Retrieved 4053:. Retrieved 4049: 3983: 3977: 3971: 3959:. Retrieved 3931: 3889:. Retrieved 3862:. Retrieved 3830:. Retrieved 3824: 3799:. Retrieved 3794: 3769:. Retrieved 3760: 3735:. Retrieved 3726: 3701:. Retrieved 3696: 3667:. Retrieved 3656: 3629:. Retrieved 3620: 3595:. Retrieved 3586: 3561:. Retrieved 3552: 3527:. Retrieved 3521: 3496:. Retrieved 3485: 3460:. Retrieved 3451: 3425: 3418:. Retrieved 3407: 3378:November 18, 3376:. Retrieved 3365: 3340:. Retrieved 3329: 3304:. Retrieved 3269:. Retrieved 3238:. Retrieved 3234:the original 3207:. Retrieved 3196: 3124: 3118: 3112: 3100:. Retrieved 3091: 3081: 3056: 3050: 3029:. Retrieved 2994:. Retrieved 2913:Asteroid Day 2892: 2884: 2882: 2878:103P/Hartley 2871: 2865: 2856: 2850: 2844: 2838: 2828: 2822: 2814: 2808: 2802: 2794: 2774: 2766: 2762: 2756: 2744: 2740: 2737:Space mining 2717: 2715: 2709: 2705: 2682: 2680: 2638: 2608: 2604: 2602: 2591: 2588:101955 Bennu 2581: 2575: 2572:162173 Ryugu 2569: 2562: 2548: 2534: 2524: 2520:human-crewed 2497: 2489: 2486:101955 Bennu 2471: 2448: 2426: 2411: 2391: 2388: 2382:of the 1966 2333: 2325: 2317:space probes 2314: 2287: 2276: 2261: 2248: 2247: 2220: 2212: 2154: 2140: 2129: 2092: 2052: 2021: 1983: 1958: 1942: 1939: 1935: 1919: 1900: 1881: 1852: 1846: 1828: 1811:1036 Ganymed 1801: 1797: 1722: 1697: 1680: 1665: 1653: 1612: 1607: 1605: 1576: 1565: 1557: 1536: 1532:1036 Ganymed 1525: 1509: 1492: 1488: 1465: 1446: 1426: 1419: 1401: 1379: 1375: 1368: 1363:NEO Surveyor 1351: 1304: 1259: 1252: 1245: 1238: 1234: 1177: 1163: 1149: 1139: 1104: 1085: 1068: 1039:Torino scale 1036: 1031:Torino scale 1021: 1005: 999: 997: 974: 954: 942: 934:Noah's flood 930: 902: 859: 825: 786:nuclear test 775: 736: 717: 708:Impact event 688: 677: 669: 632: 630:) of Earth. 614: 586: 564:69230 Hermes 561: 536: 521: 508: 489: 470: 416: 377: 367: 357: 328: 311:Torino scale 308: 284: 247: 243: 241: 236:: 33 (0.10%) 185: 108: 105:103P/Hartley 29: 13657:Outer space 13645:Spaceflight 13566:Local Sheet 13560:Local Group 13343:Rubble pile 13331:Roche limit 13326:Ring system 13277:Outer space 13252:Kuiper belt 13222:Hill sphere 13217:Hills cloud 13165:Debris disk 13160:Cosmic dust 12944:Exploration 12899:Planet Nine 12884:Fifth giant 12858:Hills cloud 12819:Kuiper belt 12790:exceptional 12706:Trojan camp 11855:Cosmic dust 11819:Long-period 11809:Halley-type 11765:Kuiper belt 11650:Designation 11280:Deep Impact 11141:Main topics 10569:occultation 10477:Exploration 10432:small types 9860:(min. 5:38) 9843:(min. 7:14) 9745:January 26, 9692:January 26, 9666:January 27, 9640:January 13, 9610:January 27, 9574:January 27, 9548:January 26, 9522:January 26, 9500:January 26, 9453:January 26, 9425:January 27, 9394:January 27, 9332:January 27, 9271:January 27, 9245:January 27, 9214:January 31, 9188:January 31, 9162:January 27, 9140:January 27, 9067:January 27, 8982:January 27, 8952:January 27, 8925:January 27, 8849:February 3, 8826:January 25, 8746:January 24, 8685:February 7, 8526:January 27, 8457:January 27, 8430:January 27, 8339:January 27, 8325:PR Newswire 8305:February 3, 8237:February 3, 8150:February 3, 8078:January 27, 7997:January 27, 7949:January 25, 7841:January 25, 7819:January 25, 7752:: 416–423. 7717:January 27, 7684:January 27, 7556:January 27, 7499:January 26, 7493:PR Newswire 7473:January 26, 7447:January 26, 7263:: 185–197. 7236:January 25, 7187:January 25, 7159:January 26, 7134:January 26, 7073:January 26, 6996:January 27, 6992:. ESA NEOCC 6939:January 27, 6871:January 26, 6849:January 26, 6818:January 26, 6785:January 27, 6752:January 26, 6719:January 25, 6697:January 24, 6618:this figure 6610:January 24, 6526:January 26, 6492:January 26, 6395:January 26, 6364:January 26, 6304:January 31, 6278:January 31, 6255:January 31, 6232:January 31, 6179:: 321–327. 6156:January 26, 6091:January 26, 6066:January 26, 6044:January 26, 6013:January 29, 5952:January 26, 5758:January 26, 5723:January 26, 5690:January 26, 5658:January 27, 5627:January 26, 5594:January 27, 5569:January 27, 5547:January 27, 5464:January 27, 5385:January 25, 5359:January 27, 5306:January 27, 5119:January 27, 5084:January 25, 5057:January 27, 5007:January 27, 4938:January 27, 4881:January 27, 4795:January 27, 4763:January 27, 4725:January 27, 4690:January 27, 4668:January 25, 4640:January 25, 4611:January 24, 4549:January 26, 4410:January 26, 4388:January 26, 4355:January 27, 4333:January 27, 4279:January 24, 4250:January 26, 4224:: 210–220. 4179:(1): 1–20. 4150:January 26, 4111:January 26, 4082:January 26, 4055:February 3, 3961:January 26, 3934:: 409–422. 3891:January 27, 3887:. ESA NEOCC 3864:January 27, 3832:January 27, 3801:January 26, 3771:January 27, 3703:January 26, 3669:January 27, 3597:January 27, 3563:January 27, 3529:January 27, 3498:January 27, 3462:January 27, 3420:January 26, 3342:January 26, 3331:ExtremeTech 3306:January 26, 3271:January 27, 3209:January 26, 3102:January 26, 3059:(1): 1–15. 3031:January 27, 2873:Deep Impact 2733:, in 2025. 2264:Kuiper belt 2257:Comet Encke 2148: Earth 1345:(ADAS) and 1037:The simple 1018:Risk scales 1001:Deep Impact 572:1566 Icarus 473:Tycho Brahe 338:Definitions 141:within 1.3 110:Deep Impact 13679:Categories 13585:Local Hole 13532:Gould Belt 13272:Oort cloud 13108:Formation, 13098:Deep space 12934:Vulcanoids 12851:Oort cloud 12775:first 1000 12711:Greek camp 12609:Meteoroids 12604:Damocloids 12550:Charikloan 11860:Meteoroids 11839:Sungrazing 11814:Hyperbolic 11770:Oort cloud 11713:Near-Earth 11513:Spaceguard 11472:Spacewatch 11452:Pan-STARRS 11447:Orbit@home 11355:OSIRIS-REx 10518:Near-Earth 10059:Near-Earth 10042:Vulcanoids 9776:August 24, 9719:August 26, 9687:AstroForge 8783:1709.09533 8663:2209.05219 8570:1608.01518 8546:"Asteroid 8447:"Cruithne" 8391:(letter). 8283:2304.14136 8207:1603.02415 8128:2310.08724 7881:1905.08695 7759:1604.06328 6896:(2): 299. 6658:2310.20149 6554:(2): 156. 5332:2024-09-05 3993:1609.08018 3134:1703.07592 2960:References 2953:Orbit@home 2765:(formerly 2759:AstroForge 2605:OSIRIS-REx 2583:OSIRIS-REx 2508:rendezvous 2491:OSIRIS-REx 2422:astrometry 2384:Surveyor 2 2272:Oort Cloud 2223:meteoroids 2217:Meteoroids 2137: Moon 2059:retrograde 1869:Vulcanoids 1835:perihelion 1799:diameter. 1468:meteoroids 1337:(CINEOS), 1329:(LONEOS), 1319:Spacewatch 1317:(LINEAR), 1311:Spaceguard 1007:Armageddon 945:perception 926:extinction 913:technology 877:See also: 782:infrasound 712:See also: 555:, a faint 319:Spaceguard 295:meteoroids 260:perihelion 13546:Milky Way 13539:Orion Arm 13307:Formation 13292:Migration 13287:Disrupted 13155:Coatlicue 13123:Accretion 13110:evolution 13056:Asteroids 12968:astronomy 12963:Discovery 12824:Cubewanos 12745:Asteroids 12575:Quaoarian 12565:Neptunian 12555:Chironean 12540:Saturnian 12322:Enceladus 11750:Damocloid 11508:NEOShield 11343:NEA Scout 11323:Hayabusa2 11188:Meteoroid 11183:Meteorite 11082:Meteoroid 11077:Meteorite 10734:Post-2000 9896:Asteroids 9766:Space.com 9740:SpaceNews 9543:SpaceNews 9495:Space.com 9447:SpaceNews 9384:Space.com 9158:. 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Index