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Sigma Piscium : ウィキペディア英語版 | Sigma Piscium
Sigma Piscium (Sigma Psc, σ Piscium, σ Psc) is a yellow G-type giant with an apparent magnitude of +5.50. It is approximately 414 light years from Earth. It is also a double lined spectroscopic binary system with a orbital period of 81 days.〔 Sigma Piscium is moving through the Galaxy at a speed of 23.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,300 and 29,400 light years from the center of the Galaxy.〔(Sigma Piscium (HIP 4889) )〕 ==Naming== In Chinese, (), meaning ''Legs (asterism)'', refers to an asterism consisting of refers to an asterism consisting of σ Piscium, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, σ Piscium itself is known as (, (英語:the Tenth Star of Legs).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 )〕
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