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Beta Apodis
Beta Apodis (β Aps, β Apodis) is the Bayer designation for a star in the southern circumpolar constellation of Apus. It is located approximately from Earth,〔 as determined by parallax measurements. The apparent visual magnitude of this star is +4.24,〔 which is bright enough to be seen with the naked eye
The spectrum of this star matches the characteristics of a K0 III,〔 which, according to models of stellar evolution, indicates that it is in the giant star stage, having exhausted the supply of hydrogen at its core. The measured angular diameter of this star is .〔 At the estimated distance of this star, this yields a physical size of about 11 times the radius of the Sun.〔 The expanded outer atmosphere of Beta Apodis has an effective temperature of about 4,900 K.〔 This heat is causing it to glow with the characteristic orange hue of a K-type star.〔
==Naming==
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, (), meaning ''Exotic Bird'', refers to an asterism consisting of β Apodis, ζ Apodis, ι Apodis, γ Apodis, δ Octantis, δ1 Apodis, η Apodis, α Apodis and ε Apodis. Consequently, β Apodis itself is known as (, (英語:the Third Star of Exotic Bird).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 29 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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