Exoplanet
HD 128311 c
53.26 light-years
- Discovery
- Radial Velocity · 2005
- Radius
- 13 Earth radii
- Mass
- 1,204.2579 (+293.6749 / −137.3026) Earth masses
- Orbital period
- 921.538 (+1.15 / −1.15) days
- Semi-major axis
- 1.74 (+0.01 / −0.01) AU
- Equilibrium temperature
- 158.23 (+2.55 / −2.55) 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