Kepler-20c

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Kepler-20c
Extrasolar planet List of extrasolar planets
Parent star
Star Kepler-20 (KOI-070)
Constellation Lyra
Right ascension (α) 19h 10m 47.524s
Declination (δ) +42° 20′ 19.30″
Apparent magnitude (mV) 12.51
Mass (m) 0.912 ± 0.035 M
Radius (r) 0.944+0.06
−0.095
 R
Temperature (T) 5,466 ± 93 K
Metallicity [Fe/H] 0.02 ± 0.04
Age 8.8+4.7
−2.7
 Gyr
Physical characteristics
Mass (m) 16.1 +3.3
−3.7
M
Radius (r) 3.07 +0.20
−0.31
R
Density (ρ) 2.91 +0.85
−1.08
g cm−3
Temperature (T) 713
Orbital elements
Semimajor axis (a) 0.0930 AU
Eccentricity (e) <0.40
Orbital period (P) 10.854092 d
Inclination (i) 88.39 +0.16
−0.14
Discovery information
Discovery date 20 December 2011
Discoverer(s) Kepler team
Discovery method Transit (Kepler Mission)
Other detection methods Radial velocity
Discovery status Conference announcement

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 December 20, 2011.

Sources[edit]

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