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K2-21c

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This is an old revision of this page, as edited by 178.193.166.74 (talk) at 13:26, 9 May 2020 (Giving the planet's density is misleading; the planet's mass hasn't been measured. The density is taken from theoretical/empirical estimates based on its radius, which themselves assume a given planet type (hence why the error bars are as large as the estimate itself).). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

K2-21c
Discovery[1]
Discovery siteKepler Space Observatory
Discovery date2015
Transit
Orbital characteristics
0.1026 AU (15,350,000 km)
Eccentricitynull[2]
15.50120[2] d
Inclination89.08+0.63
−0.75[2]
StarK2-21
Physical characteristics
1.92+0.54
−0.52[2] R🜨
Massnull[2] ME
Mean density
5.40+5.40
−3.50 g cm−3
Temperature420 K (147 °C; 296 °F)

K2-21c also known as EPIC 206011691 c is an exoplanet orbiting K2-21 a red dwarf, every 15.5 days 273.5 ly away.[2][3][4]

References

  1. ^ Petigura, Erik A.; et al. (2015). "Two Transiting Earth-Size Planets Near Resonance Orbiting a Nearby Cool Star". The Astrophysical Journal. 811 (2): 102. arXiv:1507.08256. Bibcode:2015ApJ...811..102P. doi:10.1088/0004-637X/811/2/102.
  2. ^ a b c d e f "K2-21 c CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-14.
  3. ^ http://exoplanet.eu/catalog/epic-206011691_c/
  4. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.


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