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NGC 6139 is a globular cluster in the constellation Scorpius. ==Visibility== The cluster appears visibly small and requires larger +12" aperture telescopes to view the core. Appearing around 1.5 arcmins having a radius of .75 arcmins, despite its rather bright magnitude. 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 6139」の詳細全文を読む スポンサード リンク
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