| Kepler-20d | |
| Discoverer: | Kepler team |
| Discovered: | 20 December 2011 |
| Discovery Method: | Transit (Kepler Mission) |
| Apsis: | astron |
| Semimajor: | 0.3453AU |
| Eccentricity: | <0.60 |
| Period: | 77.61184 d |
| Inclination: | 89.570 |
| Star: | Kepler-20 (KOI-070) |
| Mass: | <20.1 |
| Density: | <4.07 g cm−3 |
| Single Temperature: | 369K |
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.