NGC 3172(又称Polarissima Borealis)是一个位于小熊座的透镜状星系,1831年由约翰·赫歇尔发现,距地球2.85亿光年,直径8.5万光年[1]。NGC 3172是离离北天极最近的NGC天体[1][3]。2010年3月,在此星系观测到Ia型超新星SN 2010af[4]。
参见
- NGC 2573:离南天极最近的NGC天体
参考
外部链接
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