Exoplanet
K2-138 g
660.74 light-years
- Discovery
- Transit · 2021
- Radius
- 3.013 (+0.303 / −0.251) Earth radii
- Mass
- 4.32 (+5.26 / −3.03) Earth masses
- Orbital period
- 41.968 (+8.43 × 10⁻³ / −7.25 × 10⁻³) days
- Semi-major axis
- 0.2311 (+1.54 × 10⁻³ / −1.96 × 10⁻³) AU
- Equilibrium temperature
- 445 (+31 / −30) 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