Exoplanet
4 UMa b
239.6 light-years
- Discovery
- Radial Velocity · 2006
- Radius
- 12.6 Earth radii
- Mass
- 2,511.4801 (+63.2479 / −120.1391) Earth masses
- Orbital period
- 270.27 (+0.24 / −0.09) days
- Semi-major axis
- 0.877 (+1 × 10⁻³ / −0) AU
- Equilibrium temperature
- 967.44 (+42.15 / −42.15) K
- Mass provenance
- Msini
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