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Omega Piscium
Omega Piscium (Omega Psc, ω Piscium, ω Psc) is a star approximately 106 light years away from Earth, in the constellation Pisces. It has a spectral type of F4IV, meaning it is a subgiant/dwarf star, and it has a temperature of 6,600 kelvins. It may or may not be a close binary star system. Variations in its spectrum were once interpreted as giving it an orbital period of 2.16 days, but this claim was later debunked as false. It is 20 times brighter than our Sun and is 1.8 times greater in mass, if it is a single star.〔(【引用サイトリンク】 url=http://www.astro.uiuc.edu/~kaler/sow/omegapsc.html )〕
Counting stars with Flamsteed numbers, Greek letters, and proper names, Omega Piscium is the named star with the highest right ascension (akin to terrestrial longitude). Due to the 26,000-year wobble of the Earth's axis, this will change in 2013, when its right ascension will reset to 0 hours. It is the first star to the east of the Circlet of Pisces,〔 which represents the head of the western fish in the constellation.〔(【引用サイトリンク】 url=http://www.astro.uiuc.edu/~kaler/sow/psc-w-p.html )〕
==Naming==
*In the catalogue of stars in the ''Calendarium'' of Al Achsasi al Mouakket, this star was designated Dzaneb al Samkat, which was translated into Latin as Cauda Piscis, meaning ''the tail of fish''.
*In Chinese, (), meaning ''Thunderbolt'', refers to an asterism consisting of refers to an asterism consisting of ω Piscium, β Piscium, γ Piscium, θ Piscium and ι Piscium. Consequently, ω Piscium itself is known as (, (英語:the Fifth Star of Thunderbolt).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 8 日 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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