| NGC 5144 | |
|---|---|
 Pan-STARRS image of NGC 5144 | |
| Observation data (J2000epoch) | |
| Constellation | Ursa Minor |
| Right ascension | 13h 23m 07s |
| Declination | 70° 27′ 43″ |
| Redshift | 0.010477 |
| Distance | 154Mly (47.22Mpc) |
| Apparent magnitude (V) | 13.1 |
| Apparent magnitude (B) | 13.4 |
| Characteristics | |
| Type | SAc pec[1] |
| Size | 64,500ly (estimated 19.78kpc) |
| Apparent size (V) | 1.2' x 0.8' |
| Other designations | |
| UGC 8420, PGC 46742, MRK 256, KUG 1321+707, MCG +12-13-005 | |
NGC 5144 is anunbarred spiralgalaxy located in the constellation ofUrsa Minor. It has avelocity of 3,202 ± 9 km/s corresponding to aHubble Distance of 47.2 ± 3.3megaparsecs (154 million light-years).[2] It was discovered byWilliam Herschel in May 1791.[3]
The luminosity class of NGC 5144 is classified as III with a broad HI line.[4] It is a possiblefield galaxy which isn't belonging to a group or any cluster, making it gravitationally isolated.[5]
NGC 5144 is also astarburst galaxy[6] and classified as aMarkarian galaxy (designated as MRK 256), since its core emits out excessive amounts ofultraviolet light.[7][8]
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