| NGC 3172 | |
| Type: | S0[1] |
| Appmag V: | 14.9 |
| Notes: | Closest NGC object to the north celestial pole. |
| Names: | NGC 3172, PGC 36847, MCG 15-1-11 |
NGC 3172 (also known as Polarissima Borealis) is a lenticular galaxy located in the constellation Ursa Minor. It is the closest NGC object to the north celestial pole.[2] Discovered by John Herschel in 1831, it is about 285 million light-years away and about 85 thousand light-years across.[3]
Two supernovae have been observed in NGC 3172. SN 2010af (type Ia, mag. 17.2), was discovered on 4 March, 2010.[4] SN 2017gla (type Ia, mag. 16), was discovered on 1 September, 2017.[5]