Astronomy:HD 18438 b

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Short description: Exoplanet

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

The planet is a massive planet with a mass 21 Jupiter mass and 1.08 Jupiter radii.[2]

Orbital characteristics

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

  1. ↑ 1.0 1.1 "HD 18438 | NASA Exoplanet Archive". https://exoplanetarchive.ipac.caltech.edu/overview/HD%2018438. 
  2. ↑ "Exoplanet-catalog" (in en). https://exoplanets.nasa.gov/exoplanet-catalog/8811/hd-18438-b/. 



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