Exoplanet
Proxima Cen b
4.24 light-years
- Discovery
- Radial Velocity · 2016
- Radius
- 1.02 Earth radii
- Mass
- 1.055 (+0.055 / −0.055) Earth masses
- Orbital period
- 11.1847 (+5.3 × 10⁻⁴ / −5.3 × 10⁻⁴) days
- Semi-major axis
- 0.0485 (+2.9 × 10⁻⁴ / −2.9 × 10⁻⁴) AU
- Equilibrium temperature
- 218 (+18 / −18) 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