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    HR 5183 b

    From Wikipedia - Reading time: 4 min
    HR 5183
    HR 5183 b.png
    The planet's orbit and comparison to Jupiter
    Discovery[1]
    Discovered byBlunt et al.
    Discovery date2019
    Detection method
    		Radial velocity
    Orbital characteristics[2]
    Periastron2.87±0.08 AU
    Apoastron41.8+22.1
    −10.6     AU
    Semi-major axis
    		22.3+11.0
    −5.3     AU
    Eccentricity0.87±0.04
    Orbital period (sidereal)
    		102+84
    −34     yr
    Inclination89.9+13.3
    −13.5
    Longitude of ascending node
    		224.0+18.2
    −20.3
    Time of periastron
    		2458122±12
    Argument of periastron
    		339.9±1.8
    Semi-amplitude38.4±0.6
    StarHR 5183
    Physical characteristics[2]
    Mass3.31+0.18
    −0.14     MJ

    HR 5183 b is an exoplanet located 102.7 light years away in the constellation of Virgo orbiting the star HR 5183. It has a mass of 3.31 MJ.[2] It has a highly eccentric (e≃0.87) orbit which takes it from within the orbit of Jupiter to beyond the orbit of Neptune, which classifies it as an eccentric Jupiter and it has been nicknamed the "whiplash planet".[3][1] It was discovered in 2019 based on two decades of radial velocity observations.[1]

    In 2021, astrometric observations revealed that HR 5183 b has a nearly edge-on orbital inclination, and thus its true mass is close to its minimum mass.[2]

    See also[edit]

    • Eccentric Jupiter
    • HD 80606 b
    • HD 20782 b

    References[edit]

    1. ^ a b c Blunt, Sarah; Endl, Michael; Weiss, Lauren M.; Cochran, William D.; Howard, Andrew W.; MacQueen, Phillip J.; et al. (August 2019). "Radial Velocity Discovery of an Eccentric Jovian World Orbiting at 18 au". The Astronomical Journal. 158 (5): 181. arXiv:1908.09925. Bibcode:2019AJ....158..181B. doi:10.3847/1538-3881/ab3e63. S2CID 201646255.
    2. ^ a b c d Venner, Alexander; Pearce, Logan A.; Vanderburg, Andrew (2021), "An Edge-On Orbit for the Eccentric Long-Period Planet HR 5183 b", Monthly Notices of the Royal Astronomical Society, 516 (3): 3431–3446, arXiv:2111.03676, Bibcode:2022MNRAS.516.3431V, doi:10.1093/mnras/stac2430
    3. ^ "This weird 'whiplash' planet is unlike anything astronomers have ever seen". NBC News. Retrieved 2019-09-13.

    External links[edit]

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