Kepler-20b is an exoplanet orbiting Kepler-20 in a system 922 light years from Earth.[2] 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 ME 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.
| Discovery | |
|---|---|
| Discovered by | Kepler team |
| Discovery date | 20 December 2011 |
| Transit (Kepler Mission) | |
| Orbital characteristics | |
| 0.04537 AU | |
| Eccentricity | <0.32 |
| 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🜨 |
| Mass | 9.7+1.41 −1.44 [1] ME |
Mean density | 8.2+2.0 −2.7 g cm−3 |
| Temperature | 1,014 K (741 °C; 1,366 °F) |