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Gamma Sagittae : ウィキペディア英語版 | Gamma Sagittae
Gamma Sagittae (Gamma Sge, γ Sagittae, γ Sge) is the brightest star in constellation Sagitta and is a red giant with an apparent magnitude of +3.47. It is approximately 258 ± 4 light years from Earth. It has been classified as anywhere from spectral type K5III to M0III. It radiates at a power 640 times that of Sun. With a mass of 2.5 times that of the Sun, Gamma Sagittae began life 750 million years ago as a white class B9 star.〔 ==Naming== In Chinese, (), meaning ''Left Flag'', refers to an asterism consisting of γ Sagittae, α Sagittae, β Sagittae, δ Sagittae, ζ Sagittae, 13 Sagittae, 11 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, γ Sagittae itself is known as (, (英語:the Fifth Star of Left Flag).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 )〕
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