HD 18438 b is a massive gas giant exoplanet or brown dwarf orbiting the star HD 18438, a red giant star located 731.0664 light years (224.146 parsecs) away from planet earth.[1]
- ^ "HD 18438 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Archived from the original on 8 June 2023. Retrieved 31 October 2023.