Exoplanet
HD 199509 b
79.27 light-years
- Discovery
- Radial Velocity · 2022
- Radius
- 7.43 Earth radii
- Mass
- 43.2247 (+3.8139 / −5.0853) Earth masses
- Orbital period
- 99.6217 (+0.142 / −0.0943) days
- Semi-major axis
- 0.426 (+0.018 / −0.019) AU
- Equilibrium temperature
- 410.73 (+13.47 / −13.47) 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