Exoplanet
Proxima Cen d
4.24 light-years
- Discovery
- Radial Velocity · 2025
- Radius
- 0.692 Earth radii
- Mass
- 0.26 (+0.038 / −0.038) Earth masses
- Orbital period
- 5.1234 (+3.5 × 10⁻⁴ / −3.5 × 10⁻⁴) days
- Semi-major axis
- 0.0288 (+1.7 × 10⁻⁴ / −1.7 × 10⁻⁴) AU
- Equilibrium temperature
- 282 (+23 / −23) 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