HD 18438 b
| Discovery | |
|---|---|
| Discovered by | Lee Byeong-Cheol et al. |
| Discovery date | 15 March 2023 (accepted) |
| Radial-velocity method | |
| Designations | |
| Orbital characteristics | |
| 2.1±0.1 AU | |
| Eccentricity | 0.1±0.1 |
| 803±5 d | |
| Inclination | 88.49°+0.78° −0.49° |
| Semi-amplitude | 305±18 m/s |
| Star | HD 18438 |
| Physical characteristics | |
| Mass | >21±1 MJ |
HD 18438 b is a substellar object, either a massive gas giant exoplanet or a brown dwarf, orbiting the star HD 18438, a red giant star located about 731 light-years (224 pc) away from Earth.