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Nu Aquilae
Nu Aquilae (ν Aql, ν Aquilae) is the Bayer designation for a solitary〔 star in the constellation of Aquila and lies close to the celestial equator. It has an apparent visual magnitude of 4.646〔 and so is visible to the naked eye. Based upon an annual parallax shift of only 1.15 mas (with a 23% margin of error),〔 it is approximately from Earth.
The spectrum of this star matches a stellar classification of F3 Ib,〔 with the luminosity class of Ib indicating this is a supergiant. It has over twelve times the mass of the Sun and 78 times the Sun's radius. The outer atmosphere has an effective temperature of 6,900 K and it is radiating 11,800 times as much light as the Sun.〔 At this heat, it has the yellow-white hue of an F-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）』
■ウィキペディアで「Nu Aquilae」の詳細全文を読む
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