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Galaxy in the constellation Ursa Minor From Wikipedia, the free encyclopedia
NGC 5939 is a spiral galaxy in the constellation of Ursa Minor. Its velocity with respect to the cosmic microwave background is 6684 ± 4 km/s, which corresponds to a Hubble distance of 98.59 ± 6.90 Mpc (∼322 million light-years).[1] It was discovered by American astronomer Lewis Swift on 11 July 1883.[2]
NGC 5939 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Ursa Minor |
Right ascension | 15h 24m 46.03s[1] |
Declination | +68° 43′ 50.3″[1] |
Redshift | 0.022235 [1] |
Heliocentric radial velocity | 6666 ± 4 km/s[1] |
Distance | 321.6 ± 22.5 Mly (98.59 ± 6.90 Mpc)[1] |
Apparent magnitude (V) | 13.1[1] |
Characteristics | |
Type | S?[1] |
Size | ~102,500 ly (31.44 kpc) (estimated)[1] |
Apparent size (V) | 0.9' x 0.5'[1] |
Other designations | |
IRAS 15244+6854, 2MASX J15244604+6843501, UGC 9854, MCG +12-15-007, PGC 55022, CGCG 338-008[1] |
Three supernovae have been observed in NGC 5939: SN 2004ax (type Ib/c, mag. 17.7),[3][4] SN 2019gss (type II, mag. 19.3),[5] and SN 2023gps (type Ia, mag. 20).[6]
NGC 5939 is part of a trio of galaxies: The other two galaxies in the group are IC 1129 and UGC 9896.[7]
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