K2-229b

K2-229b
Discovery
Discovery siteKepler Space Observatory
Discovery date2018
Transit
Orbital characteristics
0.012888 (± 0.000130)[1] AU
Eccentricity0[1]
0.584249 (± 0.000014)[1] d
14.02 h
Inclination83.9 (± 2.8)[1]
StarK2-229
Physical characteristics
1.164±0.066[1] R🜨
Mass2.59±0.43[1] ME
Mean density
8.9±2.1 g cm−3
1.91 +0.59
−0.48 g
Temperature1,960 K (1,690 °C; 3,070 °F) (equilibrium)[1]
2,332 K (2,059 °C; 3,738 °F) (day side)[2]

K2-229b (previously designated EPIC 228801451.01) is an extremely hot, solid, iron-rich exoplanet in a close orbit around the active K-dwarf K2-229 in the constellation Virgo, 335 light years away from Earth.[3]

  1. ^ a b c d e f g "K2-229 b CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2018-03-27.
  2. ^ Santerne, A.; et al. (2018). "An Earth-sized exoplanet with a Mercury-like composition". Nature Astronomy. 2 (5): 393–400. arXiv:1805.08405. Bibcode:2018NatAs...2..393S. doi:10.1038/s41550-018-0420-5. S2CID 73667350.
  3. ^ "Newly-discovered planet is hot, metallic and dense as Mercury (Update)". Retrieved 2018-03-28.