HD 18438
HD 18438 is an M2.5 III star 731 light years away with 1 known planet. It was found in 2023.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| HD 18438 b | 2.198 years | 2.1 AU | at least 6,674 | 2023 | Radial Velocity |
"At least" is a minimum mass. Radial velocity can only measure mass times the sine of the orbit's tilt.
Star
- Spectral type M2.5 III
- 3,860 K surface temperature
- 1.84 times the mass of the Sun
- 88.47 times the radius of the Sun
Data from the NASA Exoplanet Archive, as of October 3, 2026. In the 3D view sizes and distances are compressed and every orbit is drawn in the same plane. Where each planet sits along its orbit is made up.