Exoplanet
K2-9 b
270.59 light-years
- Discovery
- Transit · 2015
- Radius
- 2.25 (+0.53 / −0.96) Earth radii
- Mass
- 5.69 Earth masses
- Orbital period
- 18.4498 (+1.5 × 10⁻³ / −1.5 × 10⁻³) days
- Semi-major axis
- 0.091 (+0.013 / −0.016) AU
- Equilibrium temperature
- 314 (+67 / −64) 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