Exoplanet
GJ 581 c
20.54 light-years
- Discovery
- Radial Velocity · 2007
- Radius
- 2.5 Earth radii
- Mass
- 6.81 (+0.21 / −1.16) Earth masses
- Orbital period
- 12.9211 (+8 × 10⁻⁴ / −7 × 10⁻⁴) days
- Semi-major axis
- 0.0718 (+8 × 10⁻⁴ / −9 × 10⁻⁴) AU
- Equilibrium temperature
- 346.13 (+4.36 / −4.36) K
- Mass provenance
- Mass
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