Exoplanet
GJ 229 A c
18.77 light-years
The archive flags this planet’s confirmation as questioned in the literature.
- Discovery
- Radial Velocity · 2020
- Radius
- 2.87 Earth radii
- Mass
- 8.5814 (+0.6357 / −0.6357) Earth masses
- Orbital period
- 121.9327 (+0.0671 / −0.0816) days
- Semi-major axis
- 0.384 (+5 × 10⁻³ / −5 × 10⁻³) AU
- Equilibrium temperature
- 188.1 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