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 (2.87 to 41.8 AU) 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]
 The planet's orbit and comparison to Jupiter | |
| Discovery[1] | |
|---|---|
| Discovered by | Blunt et al. |
| Discovery date | 2019 |
| Radial velocity | |
| Orbital characteristics[2] | |
| Periastron | 2.87±0.08 AU |
| Apoastron | 41.8+22.1 −10.6 AU |
| 22.3+11.0 −5.3 AU | |
| Eccentricity | 0.87±0.04 |
| 102+84 −34 yr | |
| Inclination | 89.9+13.3 −13.5 |
| 224.0+18.2 −20.3 | |
| 2458122±12 | |
| 339.9±1.8 | |
| Semi-amplitude | 38.4±0.6 |
| Star | HR 5183 |
| Physical characteristics[2] | |
| Mass | 3.31+0.18 −0.14 MJ |
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
editReferences
edit- ^ 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.
- ^ 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
- ^ "This weird 'whiplash' planet is unlike anything astronomers have ever seen". NBC News. September 2019. Retrieved 2019-09-13.
External links
edit- Astronomers find bizarre planet 'unlike any other discovered so far', Cnet, AUGUST 27, 2019
- HR 5183, SIMBAD4
- Planet HR 5183 b, exoplanet.eu
- In the Presence of a Wrecking Ball: Orbital Stability in the HR 5183 System, Stephen R. Kane, Sarah Blunt, 8 Oct 2019
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