Exoplanet
Kepler-9 c
2,049.1 light-years
- Discovery
- Transit · 2010
- Radius
- 8.08 (+0.54 / −0.41) Earth radii
- Mass
- 29.9 (+1.1 / −1.3) Earth masses
- Orbital period
- 38.9853 (+3 × 10⁻⁴ / −3 × 10⁻⁴) days
- Semi-major axis
- 0.227 (+0.012 / −8 × 10⁻³) AU
- Equilibrium temperature
- 523 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