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) | ±0.035 0.912 M☉ |
Radius | (r) | +0.06 −0.095 0.944 R☉ |
Temperature | (T) | ±93 5466 K |
Metallicity | [Fe/H] | ±0.04 0.02 |
Age | +4.7 −2.7 8.8 Gyr | |
Physical characteristics | ||
Mass | (m) | +1.41 −1.44 9.7[1] M⊕ |
Radius | (r) | +0.066 −0.034 1.868R⊕ |
Density | (ρ) | +2.0 −2.7 8.2g cm−3 |
Temperature | (T) | 1014 |
Orbital elements | ||
Semi-major axis | (a) | 37 0.045AU |
Eccentricity | (e) | <0.32 |
Orbital period | (P) | 1219 3.696d |
Inclination | (i) | +0.36 −0.31° 86.50 |
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
- ↑ 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
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