astro.wikisort.org - Meteorite
18 Delphini b (abbreviated 18 Del b), formally named Arion /əˈraɪən/,[2] is an extrasolar planet approximately 249 light-years away in the constellation of Delphinus.
| Discovery | |
|---|---|
| Discovered by | Sato et al.[1] |
| Discovery site | Okayama Planet Search Program  Japan |
| Discovery date | 19 February 2008 |
Detection method | radial velocity |
| Orbital characteristics | |
Semi-major axis | 2.6 AU (390,000,000 km) |
| Eccentricity | 0.08 ± 0.01 |
Orbital period (sidereal) | 993.3 ± 3.2 d 2.719 y |
Time of periastron | 2451672 ± 18 |
Argument of periastron | 166.1 ± 6.5 |
The 993-day period planet orbits the yellow giant star 18 Delphini. A very massive and dense planet with a minimum mass of 10.3 MJ, it was discovered on February 19, 2008, by Bun'ei Sato.[1]
In July 2014, the International Astronomical Union 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 Arion for this planet.[5] The winning name was submitted by the Tokushima Prefectural Jonan High School Science Club of Japan. Arion was a genius of poetry and music in ancient Greece. According to legend, his life was saved at sea by dolphins after attracting their attention by the playing of his kithara[6] ('Delphinus' is Latin for 'dolphin').
See also
References
- 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.
- "Arion". Merriam-Webster Dictionary.
- 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.
- Jean Schneider (2011). "Notes for Planet 18 Del b". Extrasolar Planets Encyclopaedia. Retrieved 30 September 2011.
External links
- da Silva, L.; et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics, 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105 – lists data about the star.
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На других языках
[de] Arion (Exoplanet)
Arion (Flamsteed-Bezeichnung 18 Delphini b) ist ein Exoplaneten-Kandidat, der den Gelben Riesenstern Musica alle 993 Tage umkreist. Aufgrund seiner Masse wird angenommen, dass es sich um einen Gasplaneten oder Braunen Zwerg handelt.- [en] 18 Delphini b
[es] 18 Delphini b
18 Delphini b o nombrado por la IAU como Arion, es un planeta extrasolar sumamente masivo y denso, situado aproximadamente a 238 años luz de la Tierra, en la constelación de Delphinus. El planeta, que orbita la estrella gigante amarilla 18 Delphini, fue descubierto por Sato et al. el 18 de febrero de 2008.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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