Exoplanet
HD 18438 b
731.07 light-years
- Discovery
- Radial Velocity · 2023
- Radius
- 12.1 Earth radii
- Mass
- 6,674.3965 (+317.8284 / −317.8284) Earth masses
- Orbital period
- 803 (+5 / −5) days
- Semi-major axis
- 2.1 (+0.1 / −0.1) AU
- Equilibrium temperature
- 1,208.15 (+52.15 / −52.15) 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