Exoplanet
HD 191939 d
174.85 light-years
- Discovery
- Transit · 2020
- Radius
- 2.995 (+0.07 / −0.07) Earth radii
- Mass
- 2.8 (+0.6 / −0.6) Earth masses
- Orbital period
- 38.353 (+6 × 10⁻⁵ / −6 × 10⁻⁵) days
- Semi-major axis
- 0.2132 (+6.5 × 10⁻³ / −6.1 × 10⁻³) AU
- Equilibrium temperature
- 540 (+11 / −11) 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