Exoplanet
HD 128311 b
53.26 light-years
- Discovery
- Radial Velocity · 2002
- Radius
- 13.5 Earth radii
- Mass
- 562.2413 (+7.3101 / −7.3101) Earth masses
- Orbital period
- 453.019 (+0.404 / −0.404) days
- Semi-major axis
- 1.084 (+6 × 10⁻³ / −6 × 10⁻³) AU
- Equilibrium temperature
- 200.47 (+3.23 / −3.23) 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