Astronomy:Kepler-20b

From HandWiki
Short description: Mini-Neptune orbiting Kepler-20
Kepler-20b
Discovery
Discovered byKepler team
Discovery date20 December 2011
Transit (Kepler Mission)
Orbital characteristics
0.04537 AU
Eccentricity<0.32
Orbital period3.6961219 d
Inclination86.50+0.36
−0.31
StarKepler-20 (KOI-070)
Physical characteristics
Mean radius1.868+0.066
−0.034
R
Mean density8.2+2.0
−2.7
g cm−3
Physics1,014 K (741 °C; 1,366 °F)


Kepler-20b is an exoplanet orbiting Kepler-20 in a system 922 light years from Earth.[1] 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.

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