NGC 5144

NGC 5144 is an unbarred spiral galaxy in the constellation of Ursa Minor. It has a velocity of 3,202 ± 9 km/s corresponding to a Hubble Distance of 47.2 ± 3.3 megaparsecs (154 million light-years).^[2] It was discovered by William Herschel in May 1791.^[3] It is a possible field galaxy which does not belong to a group or cluster.^[4]

NGC 5144
Pan-STARRS image of NGC 5144
Observation data (J2000 epoch)
Constellation	Ursa Minor
Right ascension	13h 23m 07s
Declination	70° 27′ 43″
Redshift	0.010477
Distance	154 Mly (47.22 Mpc)
Apparent magnitude (V)	13.1
Apparent magnitude (B)	13.4
Characteristics
Type	SAc pec [1]
Size	64,500 ly (estimated 19.78 kpc)
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 also a starburst galaxy^[5] and classified as a Markarian galaxy (designated as MRK 256), since its core emits large amounts of ultraviolet light.^[6][7]