Exoplanet
81 Cet b
330.27 light-years
- Discovery
- Radial Velocity · 2008
- Radius
- 13.1 Earth radii
- Mass
- 1,051.0585 (+24.7906 / −21.2945) Earth masses
- Orbital period
- 1,005.57 (+1.84 / −1.94) days
- Semi-major axis
- 2.104 (+3 × 10⁻³ / −3 × 10⁻³) AU
- Equilibrium temperature
- 526.92 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