Exoplanet
GJ 251 c
18.2 light-years
- Discovery
- Radial Velocity · 2025
- Radius
- 1.8 Earth radii
- Mass
- 3.88 (+0.79 / −0.79) Earth masses
- Orbital period
- 53.647 (+0.044 / −0.044) days
- Semi-major axis
- 0.196 (+0.014 / −0.014) AU
- Equilibrium temperature
- 216 (+0.8 / −0.8) K
- Mass provenance
- Msini
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