Exoplanet
HR 858 b
104.25 light-years
- Discovery
- Transit · 2019
- Radius
- 2.004 (+0.045 / −0.047) Earth radii
- Mass
- 3.55 (+0.94 / −0.96) Earth masses
- Orbital period
- 3.5853 (+9 × 10⁻⁶ / −1.2 × 10⁻⁵) days
- Semi-major axis
- 0.0489 (+6.6 × 10⁻⁴ / −6.6 × 10⁻⁴) AU
- Equilibrium temperature
- 1,552 (+22 / −23) 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