Exoplanet
HD 1397 b
259.52 light-years
- Discovery
- Transit · 2018
- Radius
- 11.5004 (+0.2802 / −0.3026) Earth radii
- Mass
- 131.8995 (+6.3566 / −6.3566) Earth masses
- Orbital period
- 11.5353 (+7.9 × 10⁻⁴ / −8 × 10⁻⁴) days
- Semi-major axis
- 0.1097 (+1.1 × 10⁻³ / −1.3 × 10⁻³) AU
- Equilibrium temperature
- 1,228.3 (+10 / −9.9) 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