Exoplanet
HIP 81991 b
143.19 light-years
- Discovery
- Radial Velocity · 2026
- Radius
- 12.5 Earth radii
- Mass
- 3,019.3699 (+1,716.2734 / −699.2225) Earth masses
- Orbital period
- 5,860 (+603 / −603) days
- Semi-major axis
- 6.4 (+0.6 / −0.3) AU
- Equilibrium temperature
- 163.28 K
- Mass provenance
- Mass
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