29:
675:
667:
683:
3832:
3856:
3880:
3868:
838:, in order to cause the infrared data observed by Spitzer. In contradiction to the February 2016 findings, a spectroscopic study in 2012 failed to detect escaping hydrogen from the atmosphere, and a spectroscopic study in 2020 failed to detect escaping helium, indicating that the planet probably has no primordial atmosphere. Atmospheres made of heavier
532:, a process for giving proper names to certain exoplanets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced the winning name was Janssen for this planet. The winning name was submitted by the Royal Netherlands Association for Meteorology and Astronomy of the
604:
in a reanalysis of the data. He suggested that the 2.8-day planet was an alias and, separately, that there was a 260-day planet in orbit around 55 Cancri. In 2008, Fischer et al. published a new analysis that appeared to confirm the existence of the 2.8-day planet and the 260-day planet. However, the
1810:
Zhao, Lily L.; Kunovac, Vedad; Brewer, John M.; Llama, Joe; Millholland, Sarah C.; Hedges, Christina; Szymkowiak, Andrew E.; Roettenbacher, Rachael M.; Cabot, Samuel H. C.; Weiss, Sam A.; Fischer, Debra A. (8 December 2022). "Measured spin–orbit alignment of ultra-short-period super-Earth 55 Cancri
1754:
Winn, Joshua N.; Matthews, Jaymie M.; Dawson, Rebekah I.; Fabrycky, Daniel; Holman, Matthew J.; Killinger, Thomas; Kuschnig, Rainer; Sasselov, Dimitar; Dragomir, Diana; Guenther, David B.; Moffat, Anthony F.J.; Rowe, Jason F.; Rucinski, Slavek; Weiss, Werner W. (10 August 2011) . "A Super Earth
782:
A third argument is that the tidal forces, together with the orbital and rotational centrifugal forces, can partially confine a hydrogen-rich atmosphere on the nightside. Assuming an atmosphere dominated by volcanic species and a large hydrogen component, the heavier molecules could be confined
890:
releasing large clouds of dust which blanket the planet and block thermal emissions. By 2022, the observation had shown a large variability in the planetary transit depths, which can be attributed to large-scale volcanism, or to the presence of a variable gas torus co-orbital with the planet.
1613:
Hu, Renyu; Bello-Arufe, Aaron; Zhang, Michael; Paragas, Kimberly; Zilinskas, Mantas; van Buchem, Christiaan; Bess, Michael; Patel, Jayshil; Ito, Yuichi; Damiano, Mario; Scheucher, Markus; Oza, Apurva V.; Knutson, Heather A.; Miguel, Yamila; Dragomir, Diana (8 May 2024).
860:
of 55 Cancri e within the range of 4 to 12 μm. These measurements ruled out the hypothesis that the planet is a lava world covered by a "tenuous atmosphere made of vaporized rock", as previously proposed, and indicated a "bona fide volatile atmosphere likely rich in
621:
space telescope. The transits occur with the period (0.74 days) and phase that had been predicted by Dawson and
Fabrycky. This is one of the few planetary transits to be confirmed around a well-known star, and allowed investigations into the planet's composition.
564:
of 55 Cancri A. At the time of its discovery, three other planets were known orbiting the star. After accounting for these planets, a signal at around 2.8 days remained, which could be explained by a planet of at least 14.2 Earth masses in a very close orbit.
899:
Since 55 Cancri e orbits less than 0.1 AU from its host star, some scientists hypothesized that it may cause stellar flaring synchronized to the orbital period of the exoplanet. A 2011 search for these magnetic star-planet interactions that would result in
1210:; Marcy, Geoffrey W.; Butler, R. Paul; Vogt, Steven S.; Laughlin, Greg; Henry, Gregory W.; Abouav, David; Peek, Kathryn M. G.; Wright, Jason T.; Johnson, John A.; McCarthy, Chris; Isaacson, Howard (1 March 2008) . "Five Planets Orbiting 55 Cancri".
1873:
Ehrenreich, David; Bourrier, Vincent; Bonfils, Xavier; Lecavelier des Étangs, Alain; Hébrard, Guillaume; Sing, David K.; Wheatley, Peter J.; Vidal-Madjar, Alfred; Delfosse, Xavier; Udry, Stéphane; Forveille, Thierry (1 November 2012).
634:, it takes only 18 hours to complete an orbit. Analysis of its transits reveal that its orbital inclination is about 83.6°, and appears to be close to being aligned with the rotation of its parent star, with obliquity of 23
2838:
1092:
Bourrier, V.; Dumusque, X.; Dorn, C.; Henry, G. W.; Astudillo-Defru, N.; Rey, J.; Benneke, B.; Hébrard, G.; Lovis, C.; Demory, B. O.; Moutou, C.; Ehrenreich, D. (2018). "The 55 Cancri system reassessed".
721:
indicated an average day-side temperature of 2,700 K (2,430 °C; 4,400 °F) and an average night-side temperature of around 1,380 K (1,110 °C; 2,020 °F). Reanalysis of the
725:
data in 2022 found a hotter day-side temperature of 3,770 K (3,500 °C; 6,330 °F) and set an upper limit of 1,650 K (1,380 °C; 2,510 °F) on the night-side temperature.
504:, but later studies failed to confirm this, instead supporting an atmosphere composed of heavier molecules, possibly only a thin atmosphere of vaporized rock. Most recently as of 2024,
470:, taking less than 18 hours to complete an orbit. However, until the 2010 observations and recalculations, this planet had been thought to take about 2.8 days to orbit the
2291:
Tsiaras, A.; Rocchetto, M.; Waldmann, I. P.; Venot, O.; Varley, R.; Morello, G.; Damiano, M.; Tinetti, G.; Barton, E. J.; Yurchenko, S. N.; Tennyson, J. (24 March 2016).
2634:
2595:
2425:
Bourrier, V.; Ehrenreich, D.; Etangs, A. Lecavelier des; Louden, T.; Wheatley, P. J.; Wyttenbach, A.; Vidal-Madjar, A.; Lavie, B.; Pepe, F.; Udry, S. (1 July 2018).
2512:
783:
within latitudes < 80° while the volatile hydrogen is not. Because of this disparity, the hydrogen would have to slowly diffuse out into the dayside where
2656:
Meier Valdés, E. A.; Morris, B. M.; Wells, R. D.; Schanche, N.; Demory, B.-O. (2022). "Weak evidence for variable occultation depth of 55 Cnc e with TESS".
2048:
2192:
1933:
Meier, Tobias G.; Bower, Dan J.; Lichtenberg, Tim; Hammond, Mark; Tackley, Paul J. (29 September 2023). "Interior dynamics of super-Earth 55 Cancri e".
1992:
1334:
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795:
claiming to have discovered the presence of hydrogen and with other studies which were unable to discover a significant hydrogen-destruction rate.
2785:
2074:
Demory, Brice-Olivier; Gillon, Michael; et al. (April 2016). "A map of the large day-night temperature gradient of a super-Earth exoplanet".
3928:
1020:
Dawson, Rebekah I.; Fabrycky, Daniel C. (10 October 2010) . "Radial velocity planets de-aliased. A new, short period for Super-Earth 55 Cnc e".
779:
as a result of the temperatures and pressures in the planet's interior. Further observations are necessary to confirm the nature of the planet.
2427:"High-energy environment of super-Earth 55 Cancri e - I. Far-UV chromospheric variability as a possible tracer of planet-induced coronal rain"
658:, meaning that one hemisphere, referred to as dayside, permanently faces the star, while the other, the nightside, always faces away from it.
1392:
Madhusudhan, Nikku; Lee, Kanani K. M.; Mousis, Olivier (10 November 2012) . "A Possible Carbon-rich
Interior in Super-Earth 55 Cancri e".
1190:
1503:
Zhang, Michael; Knutson, Heather A.; Wang, Lile; Dai, Fei; Oklopcic, Antonija; Hu, Renyu (2021), "No
Escaping Helium from 55 Cnc e",
2624:
3913:
2791:
2541:
3938:
2949:
2847:
508:
observations have ruled out the rock vapor atmosphere scenario and provided evidence for a substantial atmosphere rich in
28:
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of its host star was announced on 27 April 2011, based on two weeks of nearly continuous photometric monitoring with the
2841:
2520:
1687:
1274:"Revisiting the Iconic Spitzer Phase Curve of 55 Cancri e: Hotter Dayside, Cooler Nightside, and Smaller Phase Offset"
1757:
1394:
2770:
913:
525:
496:
of 55 Cancri e has been extensively studied, with varying results. Initial studies suggested an atmosphere rich in
44:
477:
Due to its proximity to its star, 55 Cancri e is extremely hot, with temperatures on the day side exceeding 3,000
3908:
3835:
2942:
82:
1725:
3933:
121:
2202:
2137:
2052:
2846:
2845:
2844:
2843:
2842:
857:
740:
of the planet was confirmed, allowing scientists to calculate its density. At first it was suspected to be a
818:
exoplanet was analyzed successfully. In
November 2017, it was announced that infrared observations with the
3923:
775:. In this case, roughly a third of the planet's mass would be carbon, much of which may be in the form of
2976:
605:
2.8-day planet was shown to be an alias by Dawson and
Fabrycky in 2010; its true period was 0.7365 days.
2358:
Esteves, Lisa J.; de Mooij, Ernst J. W.; Jayawardhana, Ray; Watson, Chris; de Kok, Remco (31 May 2017).
3846:
846:
674:
505:
2566:
3418:
2601:
2567:"Webb discovers evidence of an atmosphere around a rocky super-Earth planet orbiting a Sun-like star"
2224:
Modirrousta-Galian, Darius; Locci, Daniele; Tinetti, Giovanna; Micela, Giuseppina (13 January 2020).
1453:
1212:
1022:
792:
630:
55 Cancri e orbits very close to its parent star; with average orbital distance of 0.01544 ± 0.00005
57:
2360:"A Search for Water in a Super-Earth Atmosphere: High-resolution Optical Spectroscopy of 55Cancri e"
1563:
1278:
787:. In order for this mechanism to have taken effect, it is necessary for 55 Cancri e to have become
643:, favouring dynamically gentle inward migration scenarios for this planet. 55 Cancri e may also be
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853:
819:
722:
718:
257:
110:
100:
1559:"A Nondetection of Iron in the First High-resolution Emission Study of the Lava Planet 55 Cnc e"
826:
ocean obscured by an atmosphere with a pressure of about 1.4 bar, slightly thicker than that of
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549:
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3188:
666:
202:
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2226:"Hot Super-Earths with Hydrogen Atmospheres: A Model Explaining Their Paradoxical Existence"
1956:
1901:
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958:"Detection of a Neptune-Mass Planet in the ρ Cancri System Using the Hobby-Eberly Telescope"
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8:
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1148:"ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations"
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171:
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2015:
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Lucas, P. W.; Hough, J. H.; Bailey, J. A.; Tamura, M.; Hirst, E.; Harrison, D. (2007) .
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572:. 55 Cancri e was one of the first extrasolar planets with a mass comparable to that of
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of 55 Cancri e, which is only possible if the atmosphere is predominantly hydrogen or
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Large surface-temperature variations on 55 Cancri e have been attributed to possible
748:
signature during transit, Ehrenreich speculated that its volatile materials might be
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537:
482:
2411:
2344:
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1375:
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481:. The planet's thermal emission is observed to be variable, possibly as a result of
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Demory, Brice-Olivier; Gillon, Michael; Madhusudhan, Nikku; Queloz, Didier (2016).
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before losing the totality of its hydrogen envelope. This model is consistent with
745:
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Due to its old age and proximity to the star, the planet is extremely likely to be
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93:
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871:
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The same measurements were used to confirm the existence of the uncertain planet
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NameExoWorlds: An IAU Worldwide
Contest to Name Exoplanets and their Host Stars
1645:
1595:
1558:
1535:
1310:
1273:
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1147:
901:
863:
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655:
509:
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830:. The atmosphere may contain similar chemicals in Earth's atmosphere, such as
709:(approximately 1,700 degrees Celsius or 3,100 Fahrenheit), hot enough to melt
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mission, 55 Cancri e was discovered by detecting variations in its star's
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An alternative possibility is that 55 Cancri e is a solid planet made of
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682:
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601:
581:
569:
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448:
447:. 55 Cancri e was discovered on 30 August 2004, thus making it the first
344:
127:
0.01544 ± 0.00005 AU (2,309,800 ± 7,500 km)
2596:"'Super-Earth': Astronomers finally find a rocky planet with atmosphere"
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2711:"ROME. III. The Arecibo Search for Star–Planet Interactions at 5 GHz"
2141:
1729:
1557:
Rasmussen, Kaitlin C.; Currie, Miles H.; et al. (October 2023).
928:
923:
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A Case for an
Atmosphere on Super-Earth 55 Cancri e - Astrobiology
2513:"A primeira detecção da composição atmosférica de uma super-Terra"
2006:
1892:
1771:
1408:
1226:
1036:
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3510:
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2197:
1988:"Planetpol polarimetry of the exoplanet systems 55 Cnc and τ Boo"
776:
573:
540:
who is sometimes associated with the invention of the telescope.
337:
304:
2625:"Astronomers May Have Found Volcanoes 40 Light-Years From Earth"
3764:
3749:
3744:
3739:
3676:
3530:
3520:
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2655:
2293:"Detection of an Atmosphere Around the Super-Earth 55 Cancri E"
2049:"NASA Space Telescope Sees the Light from an Alien Super-Earth"
1622:
1449:"Detection of an Atmosphere Around the Super-Earth 55 Cancri e"
849:
835:
811:
768:
764:
706:
501:
478:
463:
367:
359:
2424:
874:". The authors stated that 55 Cancri e's magma ocean could be
412:
2290:
1327:
1272:
Mercier, Samson J.; Dang, Lisa; et al. (November 2022).
842:
such as oxygen and nitrogen are not ruled out by these data.
827:
753:
444:
424:
190:
62:
2553:
Lava or Not, Exoplanet 55 Cancri e Likely to have
Atmosphere
1932:
771:-rich material that makes up the terrestrial planets in the
556:. This was achieved by making sensitive measurements of the
2991:
2616:
1617:"A secondary atmosphere on the rocky Exoplanet 55 Cancri e"
955:
823:
710:
702:
686:
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Like the majority of extrasolar planets found prior to the
471:
455:
319:
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164:
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678:
Artist's impression of 55 Cancri e with a thick atmosphere
400:
2786:
Spitzer
Detects a Steaming Super-Earth Eclipsing Its Star
1876:"Hint of a transiting extended atmosphere on 55 Cancri b"
1612:
1387:
1385:
1145:
1091:
845:
A study published in May 2024 used observations from the
728:
It was initially unknown whether 55 Cancri e was a small
428:
403:
158:
2138:"Oozing Super-Earth: Images of Alien Planet 55 Cancri e"
2649:
1926:
576:
to be discovered. It was announced at the same time as
1985:
1809:
1447:
Tsiaras, A.; Rocchetto, M.; et al. (April 2016).
1382:
1206:
3844:
1715:, International Astronomical Union, 15 December 2015.
1323:
1321:
956:
McArthur, Barbara E.; et al. (10 October 2004).
600:
In 2005, the existence of planet e was questioned by
409:
406:
33:
Artist's impression of 55 Cancri e near its host star
1391:
744:. As initial observations showed no hydrogen in its
1803:
1713:
Final
Results of NameExoWorlds Public Vote Released
1502:
670:
Artist's impression of 55 Cancri e as a lava planet
485:. It has been proposed that 55 Cancri e could be a
397:
2594:
1615:
1318:
785:X-ray and ultraviolet irradiation would destroy it
2792:Interactive visualisation of the 55 Cancri system
2709:Route, Matthew; Wolszczan, Alex (1 August 2023).
1993:Monthly Notices of the Royal Astronomical Society
1335:Monthly Notices of the Royal Astronomical Society
3895:
1819:. Springer Science and Business Media LLC: 198.
1446:
904:radio emissions resulted in no detected signal.
689:"Exoplanet Travel Bureau" poster for 55 Cancri e
2840:
1556:
798:In February 2016, it was announced that NASA's
3801:
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894:
814:. This is the first time the atmosphere of a
3648:
2164:"Nearby Super-Earth Likely a Diamond Planet"
2073:
1498:
1496:
1146:Kokori, A.; et al. (14 February 2023).
443:and its diameter is about twice that of the
2964:
2486:"First detection of super-earth atmosphere"
2130:
1857:
1271:
1202:
1200:
1198:
1152:The Astrophysical Journal Supplement Series
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1015:
1013:
946:
439:. The mass of the exoplanet is about eight
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2067:
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27:
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2005:
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1330:"Variability in the super-Earth 55 Cnc e"
1309:
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1035:
993:
983:
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371:(1,376 °C; 2,509 °F, nightside)
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2622:
2046:
1195:
1010:
681:
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363:(3,498 °C; 6,328 °F, dayside)
3929:Exoplanets detected by radial velocity
3896:
2592:
1744:
1603:
2938:
2800:
2505:
2483:
1979:
625:
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701:. The side of the planet facing its
647:with the next planet in the system,
595:
16:Hot Super-Earth orbiting 55 Cancri A
2623:Lemonick, Michael D. (6 May 2015).
2555:Elizabeth Landau. NOVEMBER 16, 2017
822:indicated the presence of a global
115:0.01464 AU (2,190,000 km)
105:0.01617 AU (2,419,000 km)
13:
2836:
2191:Wickham, Chris (21 October 2012).
1726:"NameExoWorlds The Approved Names"
661:
14:
3950:
2757:
1758:The Astrophysical Journal Letters
1395:The Astrophysical Journal Letters
962:The Astrophysical Journal Letters
705:has temperatures more than 2,000
3878:
3866:
3854:
3831:
3830:
2771:Extrasolar Planets Encyclopaedia
2025:10.1111/j.1365-2966.2008.14182.x
914:Appearance of extrasolar planets
878:and sustaining this atmosphere.
536:. It honors the spectacle maker
526:International Astronomical Union
393:
2702:
2637:from the original on 9 May 2015
2586:
2558:
2546:
2535:
2519:. February 2016. Archived from
2418:
2351:
2284:
2217:
2156:
1718:
1706:
1680:
1668:
767:-rich material rather than the
462:by a year. It is the innermost
2193:"A diamond bigger than Earth?"
1755:Transiting a Naked-Eye Star".
732:like Neptune or a large rocky
1:
3914:Exoplanets discovered in 2004
939:
806:, but no water vapor, in the
3939:Exoplanets with proper names
2658:Astronomy & Astrophysics
2431:Astronomy & Astrophysics
1935:Astronomy & Astrophysics
1880:Astronomy & Astrophysics
1095:Astronomy & Astrophysics
881:
847:James Webb Space Telescope's
543:
7:
2977:Cancer in Chinese astronomy
2766:"Notes for Planet 55 Cnc e"
2688:10.1051/0004-6361/202243768
2593:Dunham, Will (9 May 2024).
2462:10.1051/0004-6361/201832700
1965:10.1051/0004-6361/202346950
1911:10.1051/0004-6361/201219981
1789:10.1088/2041-8205/737/1/L18
1688:"NameExoWorlds The Process"
1426:10.1088/2041-8205/759/2/L40
1125:10.1051/0004-6361/201833154
1054:10.1088/0004-637X/722/1/937
907:
203:Argument of periastron
10:
3955:
2484:Staff (16 February 2016).
2328:10.3847/0004-637X/820/2/99
1843:10.1038/s41550-022-01837-2
1646:10.1038/s41586-024-07432-x
1486:10.3847/0004-637X/820/2/99
895:Search for Radio Emissions
793:spectroscopic measurements
693:55 Cancri e receives more
608:
3828:
3797:
3732:
3684:
3675:
3644:
3553:
3503:
3470:
3417:
3187:
2999:
2990:
2972:
2911:
2878:
2856:
2834:
2715:The Astrophysical Journal
2602:The Sydney Morning Herald
2565:Todd, Iain (9 May 2024).
2297:The Astrophysical Journal
2230:The Astrophysical Journal
1454:The Astrophysical Journal
1213:The Astrophysical Journal
1023:The Astrophysical Journal
858:thermal emission spectrum
375:
343:
328:
301:
275:
255:
250:
240:
220:
200:
188:
170:
144:Orbital period (sidereal)
141:
131:
119:
109:
99:
92:
80:
72:
56:
43:
38:
26:
2746:10.3847/1538-4357/acd9ad
2395:10.3847/1538-3881/aa7133
2364:The Astronomical Journal
2261:10.3847/1538-4357/ab616b
1596:10.3847/1538-3881/acf28e
1564:The Astronomical Journal
1536:10.3847/1538-3881/abe382
1505:The Astronomical Journal
1311:10.3847/1538-3881/ac8f22
1279:The Astronomical Journal
1185:10.3847/1538-4365/ac9da4
251:Physical characteristics
196:2,449,999.83643 ± 0.0001
2982:List of stars in Cancer
2966:Constellation of Cancer
2764:Jean Schneider (2011).
2680:2022A&A...663A..95M
2453:2018A&A...615A.117B
1957:2023A&A...678A..29M
1902:2012A&A...547A..18E
1117:2018A&A...619A...1B
854:Mid-Infrared Instrument
820:Spitzer Space Telescope
719:Spitzer Space Telescope
519:
191:Time of periastron
94:Orbital characteristics
3909:Cancer (constellation)
2850:
2051:. NASA. Archived from
1677:. IAU.org. 9 July 2014
800:Hubble Space Telescope
690:
679:
671:
3934:Transiting exoplanets
3024:δ (Asellus Australis)
2849:
1941:. EDP Sciences: A29.
1367:10.1093/mnras/stv2239
1191:Vizier catalog entry
685:
677:
669:
22:55 Cancri e / Janssen
3019:γ (Asellus Borealis)
2828:The 55 Cancri system
850:Near-InfraRed Camera
451:discovered around a
3924:Terrestrial planets
3816:Musket Ball Cluster
3511:GJ 3470 (Kaewkosin)
2737:2023ApJ...952..118R
2630:National Geographic
2523:on 25 February 2016
2386:2017AJ....153..268E
2319:2016ApJ...820...99T
2252:2020ApJ...888...87M
2108:10.1038/nature17169
2100:2016Natur.532..207D
2016:2009MNRAS.393..229L
1835:2023NatAs...7..198Z
1781:2011ApJ...737L..18W
1587:2023AJ....166..155R
1527:2021AJ....161..181Z
1477:2016ApJ...820...99T
1418:2012ApJ...759L..40M
1358:2016MNRAS.455.2018D
1302:2022AJ....164..204M
1236:2008ApJ...675..790F
1175:2023ApJS..265....4K
1046:2010ApJ...722..937D
985:2004ApJ...614L..81M
919:Lists of exoplanets
73:Discovery date
58:Discovery site
23:
2924:extrasolar planets
2851:
1732:on 1 February 2018
734:terrestrial planet
691:
680:
672:
626:Orbit and rotation
45:Discovered by
21:
3842:
3841:
3824:
3823:
3793:
3792:
3671:
3670:
3640:
3639:
3549:
3548:
2932:
2931:
2172:. 11 October 2012
2144:. 20 January 2012
2084:(7598): 207–209.
1694:on 15 August 2015
1630:(8017): 609–612.
1208:Fischer, Debra A.
888:volcanic activity
717:mapping with the
596:Planet challenged
538:Zacharias Janssen
524:In July 2014 the
483:volcanic activity
379:
378:
3946:
3883:
3882:
3881:
3871:
3870:
3859:
3858:
3857:
3850:
3834:
3833:
3799:
3798:
3682:
3681:
3646:
3645:
3555:
3554:
2997:
2996:
2959:
2952:
2945:
2936:
2935:
2839:
2821:
2814:
2807:
2798:
2797:
2782:
2780:
2778:
2751:
2750:
2748:
2730:
2706:
2700:
2699:
2673:
2653:
2647:
2646:
2644:
2642:
2620:
2614:
2613:
2611:
2609:
2598:
2590:
2584:
2583:
2581:
2579:
2572:BBC Sky at Night
2562:
2556:
2550:
2544:
2539:
2533:
2532:
2530:
2528:
2509:
2503:
2502:
2500:
2498:
2481:
2475:
2474:
2464:
2446:
2422:
2416:
2415:
2397:
2379:
2355:
2349:
2348:
2330:
2312:
2288:
2282:
2281:
2263:
2245:
2221:
2215:
2214:
2212:
2210:
2201:. Archived from
2188:
2182:
2181:
2179:
2177:
2160:
2154:
2153:
2151:
2149:
2134:
2128:
2127:
2093:
2071:
2065:
2064:
2062:
2060:
2044:
2038:
2037:
2027:
2009:
1983:
1977:
1976:
1950:
1930:
1924:
1923:
1913:
1895:
1870:
1855:
1854:
1828:
1813:Nature Astronomy
1807:
1801:
1800:
1774:
1751:
1742:
1741:
1739:
1737:
1728:. Archived from
1722:
1716:
1710:
1704:
1703:
1701:
1699:
1690:. Archived from
1684:
1678:
1672:
1666:
1665:
1639:
1619:
1610:
1601:
1600:
1598:
1580:
1554:
1548:
1547:
1538:
1520:
1500:
1491:
1490:
1488:
1470:
1444:
1438:
1437:
1411:
1389:
1380:
1379:
1369:
1351:
1342:(2): 2018–2027.
1325:
1316:
1315:
1313:
1295:
1269:
1256:
1255:
1229:
1204:
1193:
1189:
1187:
1177:
1167:
1143:
1137:
1136:
1110:
1089:
1066:
1065:
1039:
1017:
1008:
1007:
997:
987:
977:
975:astro-ph/0408585
953:
934:Planetary system
869:
804:hydrogen cyanide
642:
641:
468:planetary system
419:
418:
415:
414:
411:
408:
405:
402:
399:
388:, also known as
370:
362:
357:
356:
318:
317:
289:
288:
236:
235:
225:
216:
215:
184:
183:
161:
156:
153:
83:Detection method
31:
24:
20:
3954:
3953:
3949:
3948:
3947:
3945:
3944:
3943:
3894:
3893:
3891:
3889:
3879:
3877:
3865:
3855:
3853:
3845:
3843:
3838:
3820:
3803:Galaxy clusters
3789:
3785:SDSS J0849+1114
3728:
3667:
3658:Beehive Cluster
3636:
3545:
3499:
3466:
3413:
3183:
2986:
2968:
2963:
2933:
2928:
2907:
2874:
2852:
2848:
2837:
2830:
2825:
2776:
2774:
2760:
2755:
2754:
2707:
2703:
2654:
2650:
2640:
2638:
2621:
2617:
2607:
2605:
2591:
2587:
2577:
2575:
2563:
2559:
2551:
2547:
2540:
2536:
2526:
2524:
2511:
2510:
2506:
2496:
2494:
2482:
2478:
2423:
2419:
2356:
2352:
2289:
2285:
2222:
2218:
2208:
2206:
2205:on 31 July 2016
2189:
2185:
2175:
2173:
2162:
2161:
2157:
2147:
2145:
2136:
2135:
2131:
2072:
2068:
2058:
2056:
2055:on 10 June 2023
2045:
2041:
1984:
1980:
1931:
1927:
1871:
1858:
1808:
1804:
1752:
1745:
1735:
1733:
1724:
1723:
1719:
1711:
1707:
1697:
1695:
1686:
1685:
1681:
1673:
1669:
1611:
1604:
1555:
1551:
1501:
1494:
1445:
1441:
1390:
1383:
1326:
1319:
1270:
1259:
1205:
1196:
1144:
1140:
1090:
1069:
1018:
1011:
954:
947:
942:
910:
897:
884:
867:
862:
664:
662:Characteristics
640:
637:
636:
635:
628:
611:
598:
584:" orbiting the
554:radial velocity
546:
528:(IAU) launched
522:
514:carbon monoxide
396:
392:
366:<1,649
365:
364:
354:
352:
351:
349:
333:
331:Surface gravity
316:
313:
312:
311:
307:
296:
293:
287:
284:
283:
282:
270:
267:
260:
234:
231:
230:
229:
221:
214:
211:
210:
209:
205:
193:
182:
179:
178:
177:
162:
154:
151:
149:
146:
124:
122:Semi-major axis
88:Radial velocity
85:
34:
17:
12:
11:
5:
3952:
3942:
3941:
3936:
3931:
3926:
3921:
3916:
3911:
3906:
3888:
3887:
3875:
3863:
3840:
3839:
3829:
3826:
3825:
3822:
3821:
3819:
3818:
3813:
3807:
3805:
3795:
3794:
3791:
3790:
3788:
3787:
3782:
3777:
3772:
3767:
3762:
3757:
3752:
3747:
3742:
3736:
3734:
3730:
3729:
3727:
3726:
3721:
3716:
3711:
3706:
3701:
3696:
3690:
3688:
3679:
3673:
3672:
3669:
3668:
3666:
3665:
3660:
3654:
3652:
3642:
3641:
3638:
3637:
3635:
3634:
3629:
3624:
3619:
3614:
3609:
3604:
3599:
3594:
3589:
3584:
3579:
3574:
3569:
3563:
3561:
3551:
3550:
3547:
3546:
3544:
3543:
3538:
3533:
3528:
3523:
3518:
3513:
3507:
3505:
3501:
3500:
3498:
3497:
3492:
3490:73534 (Gakyid)
3487:
3482:
3476:
3474:
3468:
3467:
3465:
3464:
3459:
3454:
3449:
3444:
3439:
3434:
3429:
3423:
3421:
3415:
3414:
3412:
3411:
3406:
3401:
3396:
3391:
3386:
3381:
3376:
3371:
3366:
3361:
3356:
3351:
3346:
3341:
3336:
3331:
3326:
3321:
3316:
3311:
3306:
3301:
3296:
3291:
3286:
3281:
3276:
3271:
3266:
3261:
3256:
3251:
3246:
3241:
3236:
3231:
3226:
3219:
3214:
3209:
3204:
3199:
3193:
3191:
3185:
3184:
3182:
3181:
3176:
3171:
3166:
3161:
3156:
3151:
3146:
3141:
3136:
3131:
3126:
3121:
3116:
3111:
3109:ρ (Copernicus)
3106:
3101:
3096:
3091:
3086:
3081:
3076:
3071:
3066:
3061:
3056:
3051:
3046:
3041:
3036:
3031:
3026:
3021:
3016:
3011:
3005:
3003:
2994:
2988:
2987:
2985:
2984:
2979:
2973:
2970:
2969:
2962:
2961:
2954:
2947:
2939:
2930:
2929:
2927:
2926:
2921:
2916:
2912:
2909:
2908:
2906:
2905:
2900:
2895:
2890:
2885:
2879:
2876:
2875:
2873:
2872:
2865:
2857:
2854:
2853:
2835:
2832:
2831:
2824:
2823:
2816:
2809:
2801:
2795:
2794:
2789:
2788:(JPL 09.26.11)
2783:
2759:
2758:External links
2756:
2753:
2752:
2701:
2648:
2615:
2585:
2557:
2545:
2534:
2504:
2476:
2417:
2350:
2283:
2216:
2183:
2155:
2129:
2066:
2047:Science@NASA.
2039:
2000:(1): 229–244.
1978:
1925:
1856:
1802:
1743:
1717:
1705:
1679:
1667:
1602:
1549:
1492:
1439:
1381:
1317:
1257:
1244:10.1086/525512
1220:(1): 790–801.
1194:
1138:
1067:
1030:(1): 937–953.
1009:
995:10.1086/425561
944:
943:
941:
938:
937:
936:
931:
926:
921:
916:
909:
906:
896:
893:
883:
880:
865:
789:tidally locked
750:carbon dioxide
663:
660:
656:tidally locked
638:
627:
624:
610:
607:
597:
594:
545:
542:
521:
518:
510:carbon dioxide
377:
376:
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372:
347:
341:
340:
334:
329:
326:
325:
314:
308:
302:
299:
298:
294:
291:
285:
279:
273:
272:
268:
265:
263:1.875 ± 0.029
261:
256:
253:
252:
248:
247:
242:
238:
237:
232:
226:
223:Semi-amplitude
218:
217:
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206:
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167:
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81:
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77:
76:30 August 2004
74:
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69:
60:
54:
53:
47:
41:
40:
36:
35:
32:
15:
9:
6:
4:
3:
2:
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3812:
3809:
3808:
3806:
3804:
3800:
3796:
3786:
3783:
3781:
3778:
3776:
3773:
3771:
3770:QSO B0839+187
3768:
3766:
3763:
3761:
3758:
3756:
3753:
3751:
3748:
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3683:
3680:
3678:
3674:
3664:
3661:
3659:
3656:
3655:
3653:
3651:
3650:Star clusters
3647:
3643:
3633:
3630:
3628:
3625:
3623:
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3618:
3615:
3613:
3610:
3608:
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3570:
3568:
3565:
3564:
3562:
3560:
3556:
3552:
3542:
3539:
3537:
3536:WD J0914+1914
3534:
3532:
3529:
3527:
3524:
3522:
3519:
3517:
3514:
3512:
3509:
3508:
3506:
3502:
3496:
3493:
3491:
3488:
3486:
3483:
3481:
3478:
3477:
3475:
3473:
3469:
3463:
3460:
3458:
3455:
3453:
3450:
3448:
3445:
3443:
3440:
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3424:
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3420:
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3407:
3405:
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3397:
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3392:
3390:
3387:
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3327:
3325:
3322:
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3317:
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3312:
3310:
3307:
3305:
3302:
3300:
3297:
3295:
3292:
3290:
3287:
3285:
3282:
3280:
3277:
3275:
3272:
3270:
3267:
3265:
3262:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3240:
3237:
3235:
3232:
3230:
3227:
3225:
3224:
3220:
3218:
3215:
3213:
3210:
3208:
3205:
3203:
3200:
3198:
3195:
3194:
3192:
3190:
3186:
3180:
3177:
3175:
3172:
3170:
3167:
3165:
3162:
3160:
3157:
3155:
3152:
3150:
3147:
3145:
3142:
3140:
3137:
3135:
3132:
3130:
3127:
3125:
3122:
3120:
3117:
3115:
3112:
3110:
3107:
3105:
3102:
3100:
3097:
3095:
3092:
3090:
3087:
3085:
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3067:
3065:
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3057:
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773:Solar System
762:
742:water planet
727:
699:Gliese 436 b
692:
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578:Gliese 436 b
567:
547:
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476:
460:Gliese 876 d
458:, predating
441:Earth masses
389:
385:
381:
380:
133:Eccentricity
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3885:Outer space
3607:HIP 41378 b
3567:55 Cancri b
3064:λ (Piautos)
3034:ζ (Tegmine)
3009:α (Acubens)
2903:55 Cancri d
2898:55 Cancri f
2893:55 Cancri c
2888:55 Cancri b
2883:55 Cancri e
2869:55 Cancri B
2862:55 Cancri A
2497:17 February
1736:27 December
1698:5 September
816:super-Earth
752:instead of
746:Lyman-alpha
649:55 Cancri b
602:Jack Wisdom
582:hot Neptune
580:, another "
570:55 Cancri c
534:Netherlands
449:super-Earth
437:55 Cancri A
382:55 Cancri e
345:Temperature
315:−0.40
286:−0.33
258:Mean radius
245:55 Cancri A
233:−0.23
213:−33.4
181:−0.44
172:Inclination
137:0.05 ± 0.03
3898:Categories
3663:Messier 67
3602:HD 73534 b
3592:β Cancri b
3559:Exoplanets
3029:ε (Meleph)
2728:2202.08899
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2671:2205.08560
2444:1803.10783
2377:1705.03022
2370:(6): 268.
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2243:1912.05884
2209:26 October
2176:11 October
2148:21 January
2091:1604.05725
1948:2308.00592
1826:2212.03953
1765:(1): L18.
1637:2405.04744
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1165:2209.09673
1108:1807.04301
968:(1): L81.
940:References
876:outgassing
808:atmosphere
639:−12°
590:Gliese 436
494:atmosphere
157:(15)
111:Periastron
3904:55 Cancri
3861:Astronomy
3811:Abell 671
3780:4C +29.30
3597:GJ 3470 b
3516:HIP 41378
3189:Flamsteed
2777:8 October
2696:248862923
2527:17 August
2471:0004-6361
2404:1538-3881
2337:1538-4357
2303:(2): 99.
2278:209324096
2270:1538-4357
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2142:Space.com
2124:205248003
2007:0807.2568
1973:0004-6361
1920:0004-6361
1893:1210.0531
1851:2397-3366
1772:1104.5230
1654:1476-4687
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1434:119303024
1409:1210.2720
1227:0712.3917
1133:209888143
1062:118592734
1037:1005.4050
1004:119085463
929:Mu Arae c
924:GJ 1132 b
882:Volcanism
840:molecules
730:gas giant
695:radiation
586:red dwarf
544:Discovery
433:host star
422:exoplanet
163:17.67711
49:McArthur
39:Discovery
3836:Category
3775:UGC 4457
3755:DLA0817g
3677:Galaxies
3632:Pr0201 b
3541:YBP 1194
3526:LHS 2090
3419:Variable
3084:ξ (Nahn)
3014:β (Tarf)
2915:See also
2635:Archived
2491:Phys.org
2437:: A117.
2412:56437290
2345:53463756
2116:27027283
1797:16768578
1662:38718834
1376:53662519
1252:55779685
908:See also
832:nitrogen
758:hydrogen
715:Infrared
645:coplanar
562:spectrum
498:hydrogen
425:orbiting
420:) is an
386:55 Cnc e
101:Apastron
3847:Portals
3760:IC 2431
3264:28 (CX)
2733:Bibcode
2676:Bibcode
2664:: A95.
2449:Bibcode
2382:Bibcode
2315:Bibcode
2248:Bibcode
2198:Reuters
2096:Bibcode
2034:8684361
2012:Bibcode
1953:Bibcode
1898:Bibcode
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1831:Bibcode
1777:Bibcode
1583:Bibcode
1523:Bibcode
1473:Bibcode
1414:Bibcode
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1232:Bibcode
1170:Bibcode
1158:(1) 4.
1113:Bibcode
1042:Bibcode
980:Bibcode
902:coronal
777:diamond
738:transit
723:Spitzer
615:transit
609:Transit
574:Neptune
560:of the
466:in its
390:Janssen
305:density
3765:OJ 287
3750:3C 215
3745:3C 212
3740:3C 191
3531:Pr0211
3521:K2-187
3334:50 (A)
3329:49 (b)
3319:45 (A)
3284:36 (c)
3254:25 (d)
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2059:10 May
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812:helium
769:oxygen
765:carbon
707:Kelvin
550:Kepler
502:helium
479:Kelvin
464:planet
431:-like
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336:2.273
176:83.59
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3873:Stars
3733:Other
3504:Other
3495:79498
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3480:72945
3001:Bayer
2992:Stars
2723:arXiv
2692:S2CID
2666:arXiv
2641:8 May
2608:9 May
2578:9 May
2517:GOASA
2439:arXiv
2408:S2CID
2372:arXiv
2341:S2CID
2305:arXiv
2274:S2CID
2238:arXiv
2120:S2CID
2086:arXiv
2030:S2CID
2002:arXiv
1943:arXiv
1888:arXiv
1821:arXiv
1793:S2CID
1767:arXiv
1632:arXiv
1573:arXiv
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1463:arXiv
1430:S2CID
1404:arXiv
1372:S2CID
1344:arXiv
1288:arXiv
1248:S2CID
1222:arXiv
1160:arXiv
1129:S2CID
1103:arXiv
1058:S2CID
1032:arXiv
1000:S2CID
970:arXiv
828:Earth
754:water
697:than
588:star
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350:3,771
303:Mean
281:7.99
228:6.02
208:86.0
150:0.736
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2467:ISSN
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2333:ISSN
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2150:2012
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852:and
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711:iron
703:star
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506:JWST
500:and
492:The
472:star
456:star
355:−520
353:+669
310:6.66
277:Mass
241:Star
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