Exoplanet
Kepler-257 d
2,544.85 light-years
- Discovery
- Transit · 2014
- Radius
- 4.95 (+2.48 / −2.48) Earth radii
- Mass
- 21.7 Earth masses
- Orbital period
- 24.6646 (+5.1 × 10⁻⁵ / −5.1 × 10⁻⁵) days
- Semi-major axis
- 0.16 AU
- Equilibrium temperature
- 567 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