HD 18438 b
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]
Physical characteristics
[edit]The planet is a massive planet with a mass 21 Jupiter mass and 1.08 Jupiter radii.[2]
Orbital characteristics
[edit]The planet orbits its host star at a distance of 2.1 astronomical units (AU) at a velocity of 305 meters a second taking 803 days to complete one orbit around the star. Its orbital eccentricy is 0.1.[1]
References
[edit]- ^ a b "HD 18438 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Archived from the original on 8 June 2023. Retrieved 31 October 2023.
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Archived from the original on 4 June 2023. Retrieved 31 October 2023.
Further reading
[edit]- Lee, Byeong-Cheol; et al. (30 December 2023). "A Search for Exoplanets around Northern Circumpolar Stars. VII. Detection of Planetary Companion Orbiting the Largest Host Star HD 18438". Journal of the Korean Astronomical Society. 56 (1): 35–40. arXiv:2303.08357. Bibcode:2023JKAS...56...35L. doi:10.5303/JKAS.2023.56.1.35.
- Bang, Tae-Yang; et al. (28 February 2018). "SEARCH FOR EXOPLANETS AROUND NORTHERN CIRCUMPOLAR STARS III. LONG-PERIOD RADIAL VELOCITY VARIATIONS IN HD 18438 AND HD 158996". Journal of the Korean Astronomical Society. 51 (1): 17–25. arXiv:1803.07213. Bibcode:2018JKAS...51...17B. doi:10.5303/JKAS.2018.51.1.17.
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