Kepler-20c

Kepler-20c is an exoplanet orbiting Kepler-20. It has a mass similar to Neptune but is slightly smaller. Despite being the third-closest planet to Kepler-20, it is still close to the star, meaning that it is a hot Neptune. Along with the other four planets in the system, Kepler-20c was announced on 20 December 2011.

Kepler-20c

Discovery
Discovered by	Kepler team
Discovery date	20 December 2011
Detection method	Transit (Kepler Mission)
Orbital characteristics
Semi-major axis	0.0930 AU (13,910,000 km)
Eccentricity	<0.40
Orbital period (sidereal)	10.854092 d
Inclination	88.39+0.16 −0.14
Star	Kepler-20 (KOI-070)
Physical characteristics
Mean radius	3.07+0.20 −0.31 R🜨
Mass	16.1+3.3 −3.7 ME
Mean density	2.91+0.85 −1.08 g cm−3
Temperature	713