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Mu Andromedae
・ Mu Aquarii
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Mu Andromedae : ウィキペディア英語版
Mu Andromedae


Mu Andromedae (Mu And, μ Andromedae, μ And) is the Bayer designation for a star in the northern constellation of Andromeda. It has an apparent visual magnitude of 3.87,〔 making it readily visible to the naked eye. Based upon parallax measurements, it is approximately from Earth.〔 In the constellation, the star is situated about half way between the bright star Mirach to the southwest and the Andromeda Galaxy (M31) to the northeast.〔
The spectrum of this star matches a stellar classification of A5 V,〔 indicating that it is an A-type main sequence star. It has double the mass of the Sun and 2.4 times the Sun's radius.〔 The star is radiating about 21〔 times the luminosity of the Sun from its outer envelope at an effective temperature of 7,959 K,〔 giving it the characteristic white glow of an A-type star.〔 It is estimated to be about 600 million years old〔 with a relatively high projected rotational velocity of 75 km/s.〔
==Naming==

In Chinese, (), meaning ''Legs (asterism)'', refers to an asterism consisting of μ Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ¹ Piscium. Consequently, μ Andromedae itself is known as (, (英語:the Eighth Star of Legs).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 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「Mu Andromedae」の詳細全文を読む



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