HD 155233 b

HD 155233 b
Discovery[1]
Discovered byWittenmyer et al.
Discovery dateOctober 19, 2015
Radial velocity
Designations
HIP 84056 b
Orbital characteristics[2]
2.065+0.059
−0.062 AU
Eccentricity0.079+0.06
−0.053
825.8+9.9
−8.8 d
2.261+0.027
−0.024 yr
Inclination5.2°±1.1° or 174.8°±1.1°
91°+21°
−17°
2,455,368+192
−92 JD
157°+44°
−50°
StarHD 155233
Physical characteristics[2]
Mass31.9+8.5
−5.3 MJ

HD 155233 b is a confirmed brown dwarf orbiting around the K-type giant star HD 155233 every 826 days, some 244 light-years away.[3] It has a minimum mass of almost 3 times that of Jupiter, and so was initially thought to be a gas giant exoplanet similar to Jupiter. However, in 2023 the inclination and true mass of HD 155233 b were determined via astrometry, showing it to be a brown dwarf about 32 times the mass of Jupiter in a nearly face-on orbit.[2][4]

HD 155233 b was discovered by Wittenmyer et al. in October 2015.[1] The orbit and mass were refined in 2016,[5] and again in 2023.[2]

  1. ^ a b Cite error: The named reference Wittenmyer2015 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Xiao2023 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference NasaExoplanetArchive was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Jones2016 was invoked but never defined (see the help page).