Exoplanet
HD 40307 d
42.19 light-years
- Discovery
- Radial Velocity · 2009
- Radius
- Unknown
- Mass
- < 1,775.3895 Earth masses
- Orbital period
- 20.432 (+0.022 / −0.024) days
- Semi-major axis
- 0.1321 (+6.6 × 10⁻³ / −6.6 × 10⁻³) AU
- Equilibrium temperature
- 541 (+625 / −625) 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