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KOI-1257 b
Orbiting KOI-1257, discovered in 2014 (7519) by Kepler via the Transit method.
Planet
| Radius | 10.54 R⊕ |
| Mass | 460.83 M⊕ |
| Orbital period | 86.65 Earth days (~0.2 Earth years) |
| Orbital eccentricity | 0.772 |
| Equilibrium temperature | 511 K (238 °C) |
Host star — KOI-1257
| Temperature | 5520 K (5247 °C) |
| Radius | 1.13 R☉ |
| Mass | 0.99 M☉ |
Location
| Distance from Earth | Unknown |
| Right ascension / Declination | 291.2251 / 44.9273 |
Last refreshed 2026-09-13 from NASA's Exoplanet Archive.