NGC 5253 | |
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![]() NGC 5253 is one of the nearest of the known Blue Compact Dwarf (BCD) galaxies [1] | |
Observation data (J2000 epoch) | |
Constellation | Centaurus |
Right ascension | 13h 39m 55.9561s [2] |
Declination | −31° 38′ 24.364″ [2] |
Redshift | 407 ± 3 km/s [2] |
Distance | 10.9 ± 0.6 Mly (3.33 ± 0.17 Mpc) [3] |
Apparent magnitude (V) | 10.9 [2] |
Characteristics | |
Type | Im pec [2] |
Size | 27,300 ly (8.37 kpc) (estimated) [2] |
Apparent size (V) | 5.0′ × 1.9′ [2] |
Other designations | |
Haro 10, ESO 445- G 004, IRAS 13370-3123, UGCA 369, MCG -05-32-060, PGC 48334 [2] |
NGC 5253 is an irregular galaxy in the constellation Centaurus. It was discovered by William Herschel on 15 March 1787. [4] [5]
NGC 5253 is located within the M83 Subgroup of the Centaurus A/M83 Group, a relatively nearby galaxy group that includes the radio galaxy Centaurus A and the spiral galaxy M83 (the Southern Pinwheel Galaxy). NGC 5253 is considered a dwarf starburst galaxy [6] and also a blue compact galaxy. [7]
Two supernovae have been observed in NGC 5253:
NGC 5253 contains a giant dust cloud hiding a cluster (believed to be a super star cluster) of more than one million stars, among them up to 7,000 O-type stars. The cluster is 3 million years old and has a total luminosity of more than one billion suns. It is the site of efficient star formation, with a rate at least 10 times higher than comparable regions in the Milky Way. [15] [16]