About this system
The innermost, Kepler-257 b, circles it in 2.38 days; the outermost, Kepler-257 d, in 24.7 days.
Worlds of Kepler-257
| Name | Type | Size | A year | Temperature |
|---|---|---|---|---|
| Kepler-257 b | Sub-Neptune | 2.6 × Earth | 2.38 days | 1,237 K |
| Kepler-257 c | Neptune-like | 5.4 × Earth | 6.58 days | 881 K |
| Kepler-257 d | Neptune-like | 5 × Earth | 24.7 days | 567 K |