Exoplanet
Kepler-1638 b
4,975.58 light-years
- Discovery
- Transit · 2016
- Radius
- 1.87 (+0.33 / −0.22) Earth radii
- Mass
- 4.16 Earth masses
- Orbital period
- 259.3368 (+0.013 / −0.013) days
- Semi-major axis
- 0.745 (+0.021 / −0.02) AU
- Equilibrium temperature
- 304 (+39 / −31) 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