Exoplanet
K2-128 b
373.9 light-years
- Discovery
- Transit · 2017
- Radius
- 1.42 (+0.16 / −0.13) Earth radii
- Mass
- 2.6 Earth masses
- Orbital period
- 5.6758 (+4.11 × 10⁻⁴ / −4.14 × 10⁻⁴) days
- Semi-major axis
- 0.056 (+2 × 10⁻³ / −2 × 10⁻³) AU
- Equilibrium temperature
- 803.1 (+47.63 / −47.63) 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