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Nu Aquarii
Nu Aquarii (ν Aqr, ν Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. It shares the traditional name Albulaan with μ Aquarii. The name derives from an Arabic term ''al-bulacān'' (ألبولعان) meaning "the two swallowers". This star, along with ε Aqr (Albali) and μ Aqr (Albulaan), were al Bulaʽ (البلع), the Swallower.〔〔〔
In Chinese, (), meaning ''Celestial Ramparts'', refers to an asterism consisting of ν Aquarii, ξ Aquarii, 46 Capricorni, 47 Capricorni, λ Capricorni, 50 Capricorni, 18 Aquarii, 29 Capricorni, 9 Aquarii, 8 Aquarii, 14 Aquarii, 17 Aquarii and 19 Aquarii.〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, ν Aquarii itself is known as (, (英語:the Tenth Star of Celestial Ramparts).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 15 日 )〕
With an apparent visual magnitude of 4.52,〔 Nu Aquarii is visible to the naked eye. Its distance from Earth, as determined from parallax measurements, is around . At an estimated age of 708 million years,〔 it has evolved into a giant star with a spectrum that matches a stellar classification of G8 III.〔 It has than double the mass of the Sun〔 and has expanded to eight〔 times the Sun's radius. Nu Aquarii is radiating 37-fold〔 the luminosity of the Sun from its outer atmosphere at an effective temperature of 4,920 K.〔 At this heat, the star is glowing with the yellowish hue of a G-type star.〔
==References==
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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