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NGC 2509 (OCL 630, ESO 561-SC7) is an open cluster in the constellation of Puppis. The age of this cluster is estimated to be years and its distance is estimated to be 912±15 pc. Its apparent magnitude is 9.3. ==References== *http://prints.iiap.res.in/bitstream/2248/2342/1/paper-2.pdf 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「NGC 2509」の詳細全文を読む スポンサード リンク
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