| Discovery | |
|---|---|
| Discovered by | Kepler team |
| Discovery date | 20 December 2011 |
| Detection method | Transit (Kepler Mission) |
| Orbital characteristics | |
| Semi-major axis | 0.3453 AU (51,660,000 km) |
| Eccentricity | <0.60 |
| Orbital period (sidereal) | 77.61184 d |
| Inclination | 89.570 |
| Star | Kepler-20 (KOI-070) |
| Physical characteristics | |
| Mean radius | 2.75+0.17 −0.30 R🜨 |
| Mass | <20.1 ME |
| Mean density | <4.07 g cm |
| Temperature | 369 K (96 °C; 205 °F) |
Kepler-20d is an exoplanet orbiting Kepler-20. It has a mass and radius similar to Neptune. Despite being the furthest planet from the star, it has an orbit similar to Mercury, meaning that it is a Hot Neptune. Along with the other four planets in the system, Kepler-20d was announced on December 20, 2011.
References
| The Kepler-20 system | |
|---|---|
| Stars | |
| Planets | |
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