|Discovered by||Kepler team|
|Discovery date||20 December 2011|
|Transit (Kepler Mission)|
−1.44  M⊕
−2.7 g cm−3
Kepler-20b is an exoplanet orbiting Kepler-20. It is classified as a Super-Earth, as it has a radius and mass greater than that of Earth. At about 1.87 R⊕, it would most likely be a Mini-Neptune, but its high mass of 9.7 M⊕ implies that it is an iron-rich rocky world. Along with the other four planets in the system, Kepler-20b was announced on 20 December 2011.
- https://arxiv.org/abs/1608.06836 A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system
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