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HD 155233 b is a confirmed exoplanet orbiting around the K Giant star HD 155233 every 885 days some 244.94 light-years away. It has a mass of 636 Earth masses or 2 Jupiter masses and is likely a gas giant similar of that to Jupiter just double the mass. It was discovered by Wittenmyer et al. on October 22nd 2015.[3][4][5]

HD 155233 b
Discovery
Discovered byWittenmyer et al.
Discovery dateOctober 19, 2015
Detection method
Radial velocity
Orbital characteristics
Semi-major axis
2.07 ± 0.10 AU (310,000,000 ± 15,000,000 km)[1]
Eccentricity0.04±0.04[2]
Orbital period (sidereal)
818.8±12.1 d[2]
StarHD 155233
Physical characteristics
Mass2.6±0.3 MJ[2]

    Planetary orbit and mass were refined in 2016.[2]


    References


    1. "HD 155233 b CONFIRMED PLANET OVERVIEW PAGE". NASA. Retrieved 2015-10-22.
    2. Four new planets around giant stars and the mass-metallicity correlation of planet-hosting stars, 2016, arXiv:1603.03738
    3. NASA Exoplanet Archive. News ticker slide one.
    4. "HD 155233". Universe Guide. Retrieved 2019-12-26.
    5. The Pan-Pacific Planet Search III: Five companions orbiting giant stars, 2015, arXiv:1510.04343

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