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27:
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in March 2007. Another unidentified satellite of Earth, XL8D89E, was discovered in June 2016 on a similar - but not identical - orbit. It is likely, though unproven, that both 6Q0B44E and XL8D89E are the same object, with the orbit shifted in the intervening decade by non-gravitational accelerations
752:
389:
The object is just a few metres across and was classified as probably artificial. 6Q0B44E (and XL8D89E) orbits Earth between 585,000 and 983,000 km, which is 2 to 3 times the distance of the Moon's orbit, over a period of 80 days. Its density was estimated at around 15 kg/m, too
396:
calculated from the observations suggest that 6Q0B44E probably entered the Earth–Moon system between 2001 and 2003, although it may have arrived up to a decade earlier. Similarities between the discoveries of 6Q0B44E and
405:
rocket, led some astronomers to speculate that 6Q0B44E may be another relic of human space exploration which has returned to Earth orbit. However, no space mission has been identified as the source of 6Q0B44E.
333:, just a few metres across. Orbit calculations show it experiences non-gravitational accelerations (such as a slow gas leak) that gradually shift its position, making it difficult to track.
2238:
1812:
2208:
2009:
581:
XL8D89E has been seen multiple times since 2015, but it is likely identical to 6Q0B44E, an object in a very similar orbit seen more than a decade ago, in 2006-2007.
373:. As the object moved away from Earth, its brightness dropped on an approximately six-month cycle down to 28th magnitude, severely limiting study.
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6Q0B44E was first thought to be a meteor when it was spotted in 2006; it's now considered artificial but its originating spacecraft is not known.
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381:(such as slow escape of gas). XL8D89E was observed regularly until May 2017, then again in November 2018, before being lost.
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Ortiz, Noelia Sánchez; Torres, Jaime Nomen; Cano, Juan L.; Micheli, Marco (2019). T. Flohrer; R. Jehn; F. Schmitz (eds.).
517:
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Micheli, Marco; Tholen, David J.; Elliott, Garrett T. (2012). "Detection of radiation pressure acting on 2009 BD".
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Identification of SST community support to reduce false positives in the identification of NEO imminent impactors
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6Q0B44E was spotted at what was later calculated to be the brightest part of its orbit, at 19th
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on 28 August 2006. The sighting was confirmed the next day by observations at the
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425:- An object making close approaches to the Earth–Moon system around every twenty years
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The object was observed 56 times in the seven months after its discovery, but was
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Animation of 6Q0B44E's calculated orbit around Earth and the Moon from 2004-09
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322:. It is likely, though unproven, that the same object was re-discovered as
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476:. Distant Artificial-Satellites Observers’ Circulars. Harvard University.
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The properties of 6Q0B44E indicate it is probably an artificial item of
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in August 2006. It was observed until March 2007, at which point it was
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low for natural rock but similar to an empty fuel tank.
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710,177 km (441,284 mi) (1.847 LD, 111.35 ER)
169:
862,590 km (535,990 mi) (2.244 LD, 135.24 ER)
568:
609:
695:The Distant Artificial Satellites Observation Page
310:, is a small object that was discovered orbiting
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467:
465:
447:– Another asteroid in an Earth horseshoe orbit
915:
726:
511:
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326:, which was observed between 2015 and 2018.
575:. 1st NEO and Debris Detection Conference.
557:This is probably the same object as 6Q0B44E
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25:
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151:557,765 km (346,579 mi) (1.451
2246:Interstellar and circumstellar molecules
2467:Astronomical objects discovered in 2006
2442:) may be read as "within" or "part of".
1470:Planetary orbit-crossing minor planets
665:"Rocket or Rock? NEO confusion abounds"
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662:
528:
714:
232:Longitude of ascending node
663:Azriel, Merryl (25 September 2013).
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750:
14:
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688:
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2321:
2309:
740:
486:
2472:Discoveries by Richard Kowalski
2209:Gravitationally rounded objects
579:Space Safety Programme Office.
516:Gray, Bill (3 September 2006).
472:Williams, G. (29 August 2006).
364:
656:
603:
562:
347:Lunar and Planetary Laboratory
341:6Q0B44E was first observed by
1:
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384:
642:10.1016/j.newast.2011.11.008
401:, thought to be part of the
336:
7:
2304:Outline of the Solar System
2067:Interplanetary medium/space
474:"DASO Circular No. 63"
409:
306:, sometimes abbreviated to
256:Argument of perihelion
10:
2503:
2477:Near-Earth objects in 2006
2020:Extraterrestrial materials
431:– An asteroid in an Earth
359:Table Mountain Observatory
16:Object in high Earth orbit
2340:Earth sciences portal
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2191:
2062:Interplanetary dust cloud
1941:
1777:
1707:
1418:
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541:"Pseudo-MPEC for XL8D89E"
518:"Pseudo-MPEC for 6Q0B44E"
314:outside the orbit of the
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198:Orbital period (sidereal)
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2353:Local Interstellar Cloud
1071:other near-Earth objects
489:"Pseudo-MPC for 6Q0B44E"
285:Absolute magnitude
278:Physical characteristics
2316:Solar System portal
2042:Giant-impact hypothesis
1649:Trans-Neptunian objects
244:Time of perihelion
128:Orbital characteristics
2487:Claimed moons of Earth
2204:Possible dwarf planets
2047:Gravitational collapse
1985:Circumstellar envelope
790:
2413:Laniakea Supercluster
2030:Sample-return mission
789:
697:, accessed 2011-01-08
669:Space Safety Magazine
524:on 27 September 2007.
351:University of Arizona
2328:Astronomy portal
2229:Solar System objects
1975:Circumplanetary disk
701:Discovery of 6Q0B44E
355:Siding Spring Survey
86:Siding Spring Survey
2427:Observable universe
2224:Solar System models
2154:Protoplanetary disk
2077:Interstellar medium
2037:Frost/Ice/Snow line
634:2012NewA...17..446M
599:. 6 September 2006.
345:researchers at the
343:Catalina Sky Survey
249:2007/01/10 22:21:48
102:Discovery date
92:Mount Lemmon Survey
80:Catalina Sky Survey
21:
2407:Virgo Supercluster
2388:Milky Way subgroup
2219:Natural satellites
2102:Nebular hypothesis
2082:Interstellar space
2072:Interstellar cloud
1980:Circumstellar disc
1570:Near-Earth objects
1454:names and meanings
791:
72:Discovered by
19:
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2293:
2290:
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2267:Lagrangian points
2239:by discovery date
1837:Human spaceflight
1808:historical models
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1326:S/2015 (136472) 1
547:. 6 November 2018
451:Natural satellite
301:
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267:Satellite of
117:Alternative names
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2015:Exozodiacal dust
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1671:Detached objects
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705:Richard Kowalski
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520:. Archived from
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2097:Molecular cloud
2025:Sample curation
2005:Detached object
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707:30 August 2006
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689:External links
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618:(4): 446–452.
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593:"Spacewatch".
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137:2007 Jan 1.0 (
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1969:
1966:
1965:
1964:
1961:
1959:
1956:
1954:
1951:
1950:
1948:
1946:
1940:
1934:
1931:
1929:
1926:
1924:
1921:
1919:
1916:
1914:
1911:
1909:
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1897:
1894:
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1889:
1887:
1884:
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1879:
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1750:
1749:Subsatellites
1747:
1745:
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1740:
1737:
1735:
1732:
1730:
1727:
1725:
1722:
1720:
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1716:
1714:
1712:
1709:Hypothetical
1706:
1703:
1694:
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1687:
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1682:
1679:
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1669:
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1598:
1596:
1593:
1591:
1588:
1586:
1583:
1582:
1581:
1578:
1576:
1575:Asteroid belt
1573:
1571:
1568:
1564:
1561:
1559:
1556:
1554:
1551:
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1544:
1542:
1539:
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1497:
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1477:
1475:
1472:
1471:
1469:
1467:
1464:
1460:
1457:
1455:
1452:
1451:
1450:
1449:Minor planets
1447:
1445:
1442:
1440:
1437:
1435:
1432:
1431:
1429:
1427:
1417:
1411:
1408:
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1398:
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1368:
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1300:
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1187:
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1129:
1128:
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1103:
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1021:
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905:
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835:
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828:
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806:
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792:
747:
743:
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729:
724:
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706:
702:
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696:
693:
692:
681:
670:
666:
659:
651:
647:
643:
639:
635:
631:
626:
621:
617:
613:
612:New Astronomy
606:
598:
597:
589:
582:
578:
574:
573:
565:
558:
546:
545:Project Pluto
542:
536:
534:
532:
523:
519:
512:
510:
494:
493:Project Pluto
490:
483:
475:
468:
466:
461:
452:
449:
445:
436:
434:
430:
429:3753 Cruithne
427:
423:
414:
413:
407:
404:
400:
395:
391:
382:
379:
374:
372:
362:
360:
356:
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327:
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321:
317:
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309:
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296:
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289:
288:
281:
276:
273:
270:
268:
264:
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248:
245:
240:
236:
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228:
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218:
214:
211:
206:
202:
199:
194:
190:
188:
184:
180:
177:
172:
168:
166:
162:
158:
154:
150:
148:
144:
140:
136:
132:
129:
125:
121:
118:
113:
108:
104:
100:
93:
90:
87:
84:
81:
78:
77:
75:
73:
69:
64:
53:
42:
37: 6Q0B44E
28:
23:
2482:Space debris
2462:Solar System
2438:Each arrow (
2360:Local Bubble
2346:Solar System
2344:
2137:Planetesimal
2092:Kuiper cliff
1820:Space probes
1793:Colonization
1632:Kirkwood gap
1553:Saturn Moons
1466:Planetesimal
930:Terrestrials
895:
888:
881:
874:
867:
860:
853:
846:
819:
742:Solar System
679:
672:. Retrieved
668:
658:
615:
611:
605:
596:The Guardian
594:
588:
580:
571:
564:
556:
549:. Retrieved
544:
522:the original
498:13 September
496:. Retrieved
492:
487:Gray, Bill.
482:
392:
388:
375:
368:
365:Observations
340:
331:space debris
328:
323:
307:
303:
302:
286:
210:Mean anomaly
187:Eccentricity
110:Designations
51:
40:
2401:Local Sheet
2395:Local Group
2178:Rubble pile
2166:Roche limit
2161:Ring system
2112:Outer space
2087:Kuiper belt
2057:Hill sphere
2052:Hills cloud
2000:Debris disk
1995:Cosmic dust
1779:Exploration
1734:Planet Nine
1719:Fifth giant
1693:Hills cloud
1654:Kuiper belt
1625:exceptional
1541:Trojan camp
394:Ephemerides
221:Inclination
59: Moon
48: Earth
2456:Categories
2420:Local Hole
2367:Gould Belt
2107:Oort cloud
1943:Formation,
1933:Deep space
1769:Vulcanoids
1686:Oort cloud
1610:first 1000
1546:Greek camp
1444:Meteoroids
1439:Damocloids
1385:Charikloan
674:8 December
457:References
385:Properties
203:68.93 days
141:2454101.5)
2381:Milky Way
2374:Orion Arm
2142:Formation
2127:Migration
2122:Disrupted
1990:Coatlicue
1958:Accretion
1945:evolution
1891:Asteroids
1803:astronomy
1798:Discovery
1659:Cubewanos
1580:Asteroids
1410:Quaoarian
1400:Neptunian
1390:Chironean
1375:Saturnian
1157:Enceladus
650:119185066
625:1106.0564
403:Apollo 12
371:magnitude
337:Discovery
147:Periapsis
66:Discovery
2434:Universe
2272:Moonlets
1852:programs
1825:timeline
1813:timeline
1744:Planet X
1739:Planet V
1676:Sednoids
1664:Plutinos
1637:Centaurs
1615:families
1350:Dysnomia
1338:Xiangliu
1333:Gonggong
1321:Makemake
1280:Kerberos
1167:Hyperion
1105:Callisto
1100:Ganymede
1033:Gonggong
1028:Makemake
883:Gonggong
876:Makemake
410:See also
261:140.596°
237:130.039°
215:308.134°
191:0.214612
165:Apoapsis
155:, 87.45
122:XL8D89E?
2255:Related
2234:by size
1923:Neptune
1908:Jupiter
1859:Mercury
1784:outline
1729:Phaeton
1724:Nemesis
1711:objects
1563:Neptune
1536:Jupiter
1516:Trojans
1509:Neptune
1494:Jupiter
1474:Mercury
1405:Haumean
1395:Uranian
1377: (
1297:Hiʻiaka
1231:Proteus
1221:Neptune
1209:Miranda
1199:Umbriel
1189:Titania
1177:all 146
1142:Iapetus
1095:Jupiter
989:Neptune
967:Jupiter
935:Mercury
917:Planets
842:Neptune
827:Jupiter
800:Mercury
630:Bibcode
551:25 July
439:2002 AA
417:2006 RH
349:of the
324:XL8D89E
304:6Q0B44E
225:43.273°
20:6Q0B44E
2429:
2422:
2415:
2390:
2383:
2376:
2369:
2362:
2355:
2348:
2277:Syzygy
2199:Comets
2132:System
2117:Planet
2010:EXCEDE
1918:Uranus
1913:Saturn
1903:Comets
1896:mining
1874:mining
1764:Vulcan
1605:active
1600:Hygiea
1595:Pallas
1558:Uranus
1504:Uranus
1499:Saturn
1434:Comets
1426:bodies
1424:System
1370:Jovian
1314:Weywot
1309:Quaoar
1302:Namaka
1292:Haumea
1265:Charon
1241:all 16
1236:Nereid
1226:Triton
1214:all 28
1194:Oberon
1184:Uranus
1172:Phoebe
1152:Tethys
1127:Saturn
1120:all 95
1115:Europa
1088:Deimos
1083:Phobos
1062:Earth
1023:Quaoar
1018:Haumea
998:Dwarfs
984:Uranus
972:Saturn
957:Giants
922:dwarfs
869:Quaoar
862:Haumea
837:Uranus
832:Saturn
648:
399:J002E3
57:
52:·
50:
46:
41:·
39:
35:
2192:Lists
1928:Pluto
1886:Ceres
1864:Venus
1759:Tyche
1754:Theia
1590:Vesta
1585:Ceres
1526:Earth
1521:Venus
1484:Earth
1479:Venus
1459:moons
1422:Solar
1420:Small
1379:Rhean
1362:Rings
1275:Hydra
1260:Pluto
1253:Vanth
1248:Orcus
1204:Ariel
1162:Mimas
1147:Dione
1132:Titan
1055:Moons
1043:Sedna
1013:Pluto
1008:Orcus
1003:Ceres
945:Earth
940:Venus
897:Sedna
855:Pluto
848:Orcus
821:Ceres
810:Earth
805:Venus
703:, by
646:S2CID
620:arXiv
312:Earth
272:Earth
135:Epoch
94:(G96)
88:(E12)
82:(703)
54:
43:
1881:Mars
1869:Moon
1847:list
1830:list
1531:Mars
1489:Mars
1345:Eris
1285:Styx
1137:Rhea
1078:Mars
1066:Moon
1038:Eris
950:Mars
890:Eris
815:Mars
676:2013
553:2022
500:2019
378:lost
357:and
320:lost
316:Moon
308:B44E
293:30.2
1620:PHA
1270:Nix
979:Ice
962:Gas
795:Sun
638:doi
577:ESA
420:120
287:(H)
2458::
1381:?)
1110:Io
678:.
667:.
644:.
636:.
628:.
616:17
614:.
555:.
543:.
530:^
508:^
491:.
464:^
442:29
361:.
157:ER
153:LD
139:JD
2440:→
2431:→
2424:→
2417:→
2410:→
2404:→
2398:→
2392:→
2385:→
2378:→
2371:→
2364:→
2357:→
2350:→
1786:)
1782:(
919:,
734:e
727:t
720:v
652:.
640::
632::
622::
502:.
159:)
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