Kepler-20c
Astronomical discovery
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... Wikipedia
Mean radius: 3.07+0.20; −0.31 R🜨
Discovered: December 20, 2011
Apparent magnitude (V): 12.51
Orbital period: 11 days