41 Lyncis b

41 Lyncis b / Arkas
Discovery
Discovered by	Sato et al.
Discovery site	Okayama Planet; Search Program,; Japan
Discovery date	February 19, 2008
Detection method	radial velocity
Orbital characteristics
Semi-major axis	0.81 AU (121 million km)
Eccentricity	0
Orbital period (sidereal)	184.02 ± 0.18 d
Time of periastron	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

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]

References

^ ^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 2015-08-15. Retrieved 2015-09-05.
^ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
^ "NameExoWorlds The Approved Names". Archived from the original on 2018-02-01. Retrieved 2015-12-17.

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[Sato2008-1] 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.

[2] Dictionary.com, 'Arcas'

[3] NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014

[4] "NameExoWorlds The Process". Archived from the original on 2015-08-15. Retrieved 2015-09-05.

[5] Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.

[6] "NameExoWorlds The Approved Names". Archived from the original on 2018-02-01. Retrieved 2015-12-17.

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Discovery
Discovered by	Sato et al.^[1]
Discovery site	Okayama Planet Search Program, Japan
Discovery date	February 19, 2008
Detection method	radial velocity
Orbital characteristics
Semi-major axis	0.81 AU (121 million km)
Eccentricity	0
Orbital period (sidereal)	184.02 ± 0.18 d
Time of periastron	2,452,335.4 ± 1.1
Star	41 Lyncis

Name

See also

References