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20 Arietis
20 Arietis is the Flamsteed designation for a star in the northern constellation of Aries and a member of the Hyades open cluster (Melotte 25). It has an apparent visual magnitude of 5.79,〔 which is bright enough to be just faintly visible to the named eye. Based upon an annual parallax shift of , it is approximately distant from Earth. This star has a stellar classification of F6 IV-V,〔 with the spectrum indicating it shows properties of both a main sequence and a more evolved subgiant star. 20 Arietis is around 1.7 billion years old.〔 ==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「20 Arietis」の詳細全文を読む
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