Exoplanet CatalogExoplanet Kepler-257 d
Radius4.95 R⊕Earth = 1
Mass21.7 M⊕Earth = 1
Orbital period24.66 d
Equilibrium temp.567 K≈ 294 °C
Distance2,544.9 ly
Discovered2014Transit
Size compared (radius, Earth = 1)
1.00
3.88
4.95
11.21
Where it sits among all planets (percentile)
64%
63%
69%
33%
73%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of Kepler-257 (3)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| Kepler-257 b | 2.38 | 2.61 | 7.3 | 1,237 | 2014 |
| Kepler-257 c | 6.58 | 5.41 | 25.2 | 881 | 2014 |
| Kepler-257 d | 24.66 | 4.95 | 21.7 | 567 | 2014 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| Kepler-257 | – | 5,180 | 1.04 | 0.92 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.