Kepler-20b

Kepler-20b
Exoplanet List of exoplanets
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) 5466±93 K
Metallicity [Fe/H] 0.02±0.04
Age 8.8+4.7
−2.7
 Gyr
Physical characteristics
Mass(m)9.7+1.41
−1.44
[1] M
Radius(r)1.868+0.066
−0.034
R
Density(ρ)8.2+2.0
−2.7
g cm−3
Temperature (T) 1014
Orbital elements
Semi-major axis(a) 0.04537 AU
Eccentricity (e) <0.32
Orbital period(P) 3.6961219 d
Inclination (i) 86.50+0.36
−0.31
°
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-20b is an exoplanet orbiting Kepler-20. Its radius is about twice that of Earth, with a mass around 9.7 Earth masses. It has a higher density compared to earth and is likely made out of a higher percentage of iron. Along with the other four planets in the system, Kepler-20b was announced on 20 December 2011.

References

  1. http://arxiv.org/abs/1608.06836 A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system


This article is issued from Wikipedia - version of the 8/30/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.