The Kepler-20 System

6 planets 2 stars Lyra

Kepler-20 is a planetary system in the constellation Lyra hosting 6 confirmed exoplanets around 2 stars, about 922 light-years from Earth.

Size Comparison: The Planets of Kepler-20

Planets without a measured radius are not shown.

Kepler-20 b Kepler-20 c Kepler-20 d Kepler-20 e Kepler-20 f Kepler-20 g

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of Kepler-20: 0.632–1.502 AU (conservative: 0.801–1.424 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

Planet	Type	Orbit	Radius	ESI	Discovered
Kepler-20 b	Super Earth	3.7 d	1.77 R⊕	0.27	2011
Kepler-20 c	Mini Neptune	11 d	2.89 R⊕	0.23	2011
Kepler-20 d	Super Earth	78 d	2.61 R⊕	0.41	2011
Kepler-20 e	Terrestrial	6.1 d	0.82 R⊕	0.30	2011
Kepler-20 f	Terrestrial	20 d	0.95 R⊕	0.33	2011
Kepler-20 g	Neptune-like	35 d	—	0.23	2016

The first planet found here, Kepler-20 b, was discovered in 2011 using the transit method. The most recent addition, Kepler-20 g, followed in 2016.

Kepler-20 has 6 confirmed exoplanets distributed around its 2 stars. More may await discovery.

None of the known planets in Kepler-20 orbit within the star's habitable zone.

Kepler-20 is about 922 light-years from Earth in the constellation Lyra.

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