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Pi1 Cygni
Pi1 Cygni (π1 Cyg, π1 Cygni) is the Bayer designation for a star in the constellation Cygnus. It has the traditional name Azelfafage. In Chinese, (), meaning ''Flying Serpent'', refers to an asterism consisting of π1 Cygni, α Lacertae, 4 Lacertae, π2 Cygni, HD 206267, ε Cephei, β Lacertae, σ Cassiopeiae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae, ψ Andromedae and ι Andromedae. Consequently, π1 Cygni itself is known as (, (英語:the Fourth Star of Flying Serpent))〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 )〕 ==Structure==
Pi1 Cygni has apparent magnitude +4.67 and belongs to the spectral class B3IV. It is approximately 1680 light years from Earth. Coordinates (equinox J2000.0): * Right ascension: 21h 42m 5.7s * Declination: +51°11'23.0"
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「Pi1 Cygni」の詳細全文を読む
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