Astronomy:Kepler-20c

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Kepler-20c
Discovery
Discovered byKepler team
Discovery date20 December 2011
Transit (Kepler Mission)
Orbital characteristics
0.0930 AU (13,910,000 km)
Eccentricity<0.40
Orbital period10.854092 d
Inclination88.39+0.16
−0.14
StarKepler-20 (KOI-070)
Physical characteristics
Mean radius3.07+0.20
−0.31
R
Mass16.1+3.3
−3.7
M
Mean density2.91+0.85
−1.08
g cm−3
Physics713


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.

References

http://kepler.nasa.gov/Mission/discoveries/kepler20c/