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97 Aquarii
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97 Aquarii : ウィキペディア英語版
97 Aquarii


97 Aquarii is the Flamsteed designation for a binary star system in the equatorial constellation of Aquarius. The combined apparent visual magnitude of the system is 5.20;〔 the brighter star is magnitude 5.59 while the companion is magnitude 6.72.〔 Based upon an annual parallax shift of 15.30 milliarcseconds,〔 this system is at a distance of around from Earth.
The two stars in this system orbit each other over a period of 64.62 years at an eccentricity of 0.14.〔 Both are A-type main sequence stars; the primary has a stellar classification of A2 V while its companion is A7 V.〔 Their composite spectrum shows the properties of a Lambda Boötis star, which means it displays peculiar abundances of certain elements.〔
==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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