Exoplanet
K2-138 f
660.74 light-years
- Discovery
- Transit · 2017
- Radius
- 2.904 (+0.164 / −0.111) Earth radii
- Mass
- 1.63 (+2.12 / −1.18) Earth masses
- Orbital period
- 12.7576 (+5 × 10⁻⁴ / −4.8 × 10⁻⁴) days
- Semi-major axis
- 0.1045 (+7 × 10⁻⁴ / −8.8 × 10⁻⁴) AU
- Equilibrium temperature
- 653 (+45 / −42) 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