41 Lyncis b
| Discovery | |
|---|---|
| Discovered by | Sato et al.[1] |
| Discovery site | Okayama Planet Search Program, Japan |
| Discovery date | February 19, 2008 |
| radial velocity | |
| Orbital characteristics | |
| 0.81 AU (121 million km) | |
| Eccentricity | 0 |
| 184.02 ± 0.18 d | |
| 2,452,335.4 ± 1.1 | |
| Star | 41 Lyncis |
41 Lyncis b (abbreviated 41 Lyn b), also designated HD 81688 b and named Arkas /ˈɑːrkəs/ ,[2] is an extrasolar planet approximately 280 light-years from Earth in the constellation of Ursa Major.
A gas giant with a minimum mass 2.7 times that of Jupiter, it orbits the K-type star 41 Lyncis with an orbital period of 184 days (corresponding to a semi-major axis of 0.81 AU). It was discovered and announced by Bun'ei Sato on February 19, 2008.[1]
Name
[edit ]In July 2014, the International Astronomical Union (IAU) launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.[3] The process involved public nomination and voting for the new names.[4] In December 2015, the IAU announced the name Arkas for this planet.[5] The winning name was submitted by the Okayama Astro Club of Japan. Arkas was the son of Callisto (Ursa Major) in Greek mythology.[6]
See also
[edit ]References
[edit ]- ^ a b Sato, Bun'ei; et al. (2008). "Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, ξ Aquilae and HD 81688". Publications of the Astronomical Society of Japan. 60 (3): 539–550. arXiv:0802.2590 . Bibcode:2008PASJ...60..539S. doi:10.1093/pasj/60.3.539.
- ^ Dictionary.com, 'Arcas'
- ^ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
- ^ "NameExoWorlds The Process". Archived from the original on 2015年08月15日. Retrieved 2015年09月05日.
- ^ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
- ^ "NameExoWorlds The Approved Names". Archived from the original on 2018年02月01日. Retrieved 2015年12月17日.
