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Nu Andromedae
Nu Andromedae (Nu And, ν Andromedae, ν And) is a binary star in the constellation Andromeda. The system has an apparent visual magnitude of 4.5,〔 which is bright enough to be seen with the naked eye. It is approximately from Earth.〔 Situated just over a degree to the west of this star is the Andromeda Galaxy.〔
Nu Andromedae is spectroscopic binary〔 system with a nearly circular orbit that has a period of 4.2828 days.〔 The primary component is a B-type main sequence star with a stellar classification of B5 V.〔 The fainter secondary has a classification of F8 V,〔 which makes it an F-type main sequence star. The pair are about 63 million years old.〔
==Naming==
In Chinese, (), meaning ''Legs (asterism)'', refers to an asterism consisting of ν Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ¹ Piscium. Consequently, ν Andromedae itself is known as (, (英語:the Seventh 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）』
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