Exoplanet
K2-18 b
124.03 light-years
- Discovery
- Transit · 2015
- Radius
- 2.37 (+0.22 / −0.22) Earth radii
- Mass
- 8.92 (+1.7 / −1.6) Earth masses
- Orbital period
- 32.9396 (+9.5 × 10⁻⁵ / −1 × 10⁻⁴) days
- Semi-major axis
- 0.1429 (+6 × 10⁻³ / −6.5 × 10⁻³) AU
- Equilibrium temperature
- 284 (+15 / −15) 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