|This article does not cite any references or sources. (February 2013)|
|Extrasolar planet||List of extrasolar planets|
|Right ascension||(α)||19h 10m 47.524s|
|Declination||(δ)||+42° 20′ 19.30″|
|Mass||(m)||0.912 ± 0.035 M☉|
|Temperature||(T)||5,466 ± 93 K|
|Metallicity||[Fe/H]||0.02 ± 0.04|
|Semimajor axis||(a)||0.0507 AU|
|Orbital period||(P)||6.098493 d|
|Discovery date||20 December 2011|
|Discovery method||Transit (Kepler Mission)|
|Discovery status||Conference announcement|
Kepler-20e is an exoplanet orbiting Kepler-20. The planet is notable as it is the first planet with a smaller radius than Earth found orbiting a Sun-like star. The planet is second closest to the star after Kepler-20b, and at 1040 K, it is far too hot to have liquid water on its surface. Along with the other four planets in the system, Kepler-20e was announced on December 20, 2011.
With a semimajor axis of 0.0507 AUs, Kepler-20e's orbit has a period of 6.098 days (with an extremely small margin of error). The orbit has an inclination of 87.50°, making its transits observable from the Solar System. Like the other planets of the system, the planet has a high maximum eccentricity of 0.28, but the lowest in that system.