K2-21c
| Discovery[1] | |
|---|---|
| Discovery site | Kepler Space Observatory |
| Discovery date | 2015 |
Detection method | Transit |
| Orbital characteristics | |
Semi-major axis | 0.1026 AU (15,350,000 km) |
| Eccentricity | null[2] |
Orbital period | 15.50120[2] d |
| Inclination | 89.08+0.63 −0.75[2] |
| Star | |
| Physical characteristics | |
Mean radius | 1.92+0.54 −0.52[2] REarth |
| Mass | null[2] MEarth |
Mean density | 5.40+5.40 −3.50 g cm−3 |
| Temperature | 420 K (147 °C; 296 °F) |
K2-21c also known as EPIC 206011691 c is an exoplanet orbiting a red dwarf, every 15.5 days 273.5 ly away.[2][3][4]
References[]
- ^ 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.
- ^ a b c d e f "K2-21 c CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-14.
- ^ http://exoplanet.eu/catalog/epic-206011691_c/
- ^ 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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