Exoplanet
HD 5278 c
187.82 light-years
- Discovery
- Radial Velocity · 2021
- Radius
- 4.49 Earth radii
- Mass
- 18.4 (+1.8 / −1.9) Earth masses
- Orbital period
- 40.87 (+0.18 / −0.17) days
- Semi-major axis
- 0.2416 (+2.7 × 10⁻³ / −2.7 × 10⁻³) AU
- Equilibrium temperature
- 664.95 (+9.05 / −9.05) 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