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Tau Andromedae
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Tau Andromedae : ウィキペディア英語版
Tau Andromedae


Tau Andromedae (τ And, τ Andromedae) is the Bayer designation for a star in the northern constellation of Andromeda. It has an apparent visual magnitude of +4.94,〔 which is bright enough to be viewed from dark suburban skies. From parallax measurements made during the Hipparcos mission, the distance to this star can be estimated as roughly from Earth. The brightness of this star is diminished by 0.24 in magnitude due to extinction caused by intervening gas and dust.〔 It is approximately 681 light years from Earth.
The spectrum of this star matches a stellar classification of B5 III,〔 with the luminosity class of III indicating that this is a giant star. It is radiating about 851 times the luminosity of the Sun.〔
==Naming==
In Chinese, (), meaning ''Heaven's Great General'', refers to an asterism consisting of τ Andromedae, γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, χ Andromedae, υ Andromedae, 56 Andromedae, β Trianguli, γ Trianguli and δ Trianguli. Consequently, τ Andromedae itself is known as (, (英語:the Seventh Star of Heaven's Great General).).〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 10 日 )〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Tau Andromedae」の詳細全文を読む



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