Exoplanet
Kepler-257 c
2,544.85 light-years
- Discovery
- Transit · 2014
- Radius
- 5.41 (+2.72 / −2.72) Earth radii
- Mass
- 25.2 Earth masses
- Orbital period
- 6.5815 (+8 × 10⁻⁶ / −8 × 10⁻⁶) days
- Semi-major axis
- 0.066 AU
- Equilibrium temperature
- 881 K
- Mass provenance
- M-R relationship
Measurements may come from different studies and need not form one self-consistent model. “Msini” is a minimum mass; a mass inferred from radius is an estimate. Equilibrium temperature is a model estimate, not a measured surface temperature or evidence of habitability.
NASA archive record and references ↗
Snapshot retrieved: 2026-10-11T04:15:07.688253+00:00