11h47m11.928s, +89° 05′ 35.77″| NGC 3172 | |
|---|---|
Pan-STARRS image of NGC 3172
| |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Minor |
| Right ascension | 11h47m 11.928s[1] |
| Declination | +89° 05′ 35.77″[1] |
| Apparent magnitude (V) | 14.9[1] |
| Characteristics | |
| Type | S0[2] |
| Apparent size (V) | 0.92′ × 0.79′[1] |
| Notable features | Closest NGC object to the north celestial pole. |
| Other designations | |
| NGC 3172, PGC 36847, MCG 15-1-11 | |
NGC 3172 (also known as Polarissima Borealis[1]) is a lenticular galaxy located in the constellation Ursa Minor. It is the closest NGC object to the north celestial pole.[1] 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]
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