Astronomy:Kepler-20b
From HandWiki
Short description: Mini-Neptune orbiting Kepler-20
| Discovery | |
|---|---|
| Discovered by | Kepler team |
| Discovery date | 20 December 2011 |
| Transit (Kepler Mission) | |
| Orbital characteristics | |
| 0.04537 AU | |
| Eccentricity | <0.32 |
| Orbital period | 3.6961219 d |
| Inclination | 86.50+0.36 −0.31 |
| Star | Kepler-20 (KOI-070) |
| Physical characteristics | |
| Mean radius | 1.868+0.066 −0.034 R⊕ |
| Mean density | 8.2+2.0 −2.7 g cm−3 |
| Physics | 1,014 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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