Kepler-20d

Kepler-20d is an exoplanet orbiting Kepler-20. It has a mass and radius similar to Neptune. Despite being the furthest planet from the star, it has an orbit similar to Mercury, meaning that it is a Hot Neptune. Along with the other four planets in the system, Kepler-20d was announced on December 20, 2011.

Kepler-20d
Discovery
Discovered byKepler team
Discovery date20 December 2011
Transit (Kepler Mission)
Orbital characteristics
0.3453 AU (51,660,000 km)
Eccentricity<0.60
77.61184 d
Inclination89.570
StarKepler-20 (KOI-070)
Physical characteristics
Mean radius
2.75+0.17
−0.30
R
Mass<20.1 M
Mean density
<4.07 g cm−3
Temperature369 K (96 °C; 205 °F)

    References

      http://kepler.nasa.gov/Mission/discoveries/kepler20d/


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