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| Discovery | |
|---|---|
| Discovered by | Ofir et al. |
| Discovery date | 8 October 2013 |
| Transit (Kepler Mission) | |
| Orbital characteristics | |
| 0.664 AU (99,300,000 km) | |
| Eccentricity | 0.039 |
| 191 d | |
| Inclination | 89.588 |
| Star | Kepler-87 (KOI-1574) |
| Physical characteristics | |
| 6.14±0.29 R🜨 | |
| Mass | 6.4±0.8 ME |
Mean density | 0.152 g/cm3 (0.0055 lb/cu in) |
| Temperature | 403 K (130 °C; 266 °F) [1] |
Kepler-87c is a planet orbiting Kepler-87, a star slightly more massive than the Sun and nearing the end of its main-sequence period. [1]
Despite being larger than Neptune, Kepler-87c is only about 6.4 times more massive than Earth. This means that its density is only 0.152 g/cm3. This is the first planet with a comparable mass to have such a low density. Its equilibrium temperature is 130 °C.[2]
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