Last updated
Exoplanet List of exoplanets
Parent star
Star Kepler-20 (KOI-070)
Constellation Lyra
Right ascension (α)19h 10m 47.5235s [1]
Declination (δ)+42° 20 19.299 [1]
Apparent magnitude (mV)12.51
Distance 929±6 [1]   ly
(285±2 [1]   pc)
Mass (m)0.912±0.035  M
Radius (r)0.944+0.06
Temperature (T)5466±93  K
Metallicity [Fe/H]0.02±0.04
Age 8.8+4.7
Physical characteristics
Mass (m)19.96+3.08
[2] M
Temperature (T)524 ± 12 K
Orbital elements
Semi-major axis (a)0.2055 AU
Eccentricity (e)≤ 0.16
Orbital period (P)77.61184 d
Discovery information
Discovery date24 August 2016
Discovery method Radial velocity
Discovery status

Kepler-20g is a non-transiting exoplanet orbiting Kepler-20. Its radius is about twice that of Earth, with a minimum mass 19.96+3.08
[2] Earth masses. Kepler-20g was announced on 24 August 2016.


  1. 1 2 3 4 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. (Gaia Collaboration) (2018). "Gaia Data Release 2. Summary of the contents and survey properties". Astronomy & Astrophysics . arXiv: 1804.09365 Freely accessible. doi:10.1051/0004-6361/201833051. Gaia Data Release 2 Vizier catalog entry
  2. 1 2 A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system