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Tau1 Arietis : ウィキペディア英語版 | Tau1 Arietis
Tau1 Arietis (τ1 Ari, τ1 Arietis) is the Bayer designation for a triple star system〔 in the northern constellation of Aries. Based upon an annual parallax shift of 6.41 mas,〔 it is approximately distant from Earth. The combined apparent visual magnitude is 5.27,〔 making it faintly visible to the naked eye. The inner pair form an eclipsing binary system, with the brightness of the pair decreasing by 0.06 in magnitude during an eclipse of the primary.〔 The third component is located at an angular separation of 0.810 arcseconds and has a magnitude of 8.17.〔 The primary component is a subgiant star with a stellar classification of B5 IV.〔 It has around 3.5〔 times the size of the Sun with five〔 times the Sun's radius. This system is a member of the Cas-Tau OB association of stars that share a common motion through space.〔 ==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「Tau1 Arietis」の詳細全文を読む
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