Exoplanet
K2-189 b
789.67 light-years
- Discovery
- Transit · 2018
- Radius
- 1.403 (+0.079 / −0.043) Earth radii
- Mass
- 2.55 Earth masses
- Orbital period
- 2.5881 (+1.1 × 10⁻⁴ / −1.1 × 10⁻⁴) days
- Semi-major axis
- 0.0361 (+4 × 10⁻⁴ / −4 × 10⁻⁴) AU
- Equilibrium temperature
- 1,203 (+34 / −33) K
- Mass provenance
- M-R relationship
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