NGC 5939
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]
Right ascension15h 24m 45.9753s[1]
Declination+68° 43′ 50.69″[1]
| NGC 5939 | |
|---|---|
NGC 5939 imaged by Pan-STARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Minor |
| Right ascension | 15h 24m 45.9753s[1] |
| Declination | +68° 43′ 50.69″[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] |
| Group or cluster | NGC 5939 Group |
| Apparent magnitude (V) | 13.1[1] |
| Characteristics | |
| Type | S?[1] |
| Size | ~102,500 ly (31.44 kpc) (estimated)[1] |
| Apparent size (V) | 0.9′ × 0.5′[1] |
| Other designations | |
| IRAS 15244+6854, 2MASX J15244604+6843501, UGC 9854, MCG +12-15-007, PGC 55022, CGCG 338-008[1] | |
NGC 5939 Group
Supernovae
Three supernovae have been observed in NGC 5939:
- SN 2004ax (Type Ib/c, mag. 17.7) was discovered by the Lick Observatory Supernova Search (LOSS) on 21 March 2004.[4][5] The spectrum indicated this might be a calcium-rich supernova.[6]
- SN 2019gss (Type II-P, mag. 19.28) was discovered by the Zwicky Transient Facility on 30 may 2019.[7]
- SN 2023gps (Type Ia, mag. 20) was discovered by the Automatic Learning for the Rapid Classification of Events (ALeRCE) on 23 April 2023.[8]