Exoplanet
HD 221420 b
101.57 light-years
- Discovery
- Radial Velocity · 2019
- Radius
- 12 Earth radii
- Mass
- 7,278.2705 (+699.2225 / −699.2225) Earth masses
- Orbital period
- 1.009 × 10⁴ (+890 / −560) days
- Semi-major axis
- 10.15 (+0.59 / −0.38) AU
- Equilibrium temperature
- 123.49 (+3.01 / −3.01) 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