| NGC 5939 | |
| Constellation Name: | Ursa Minor |
| Epoch: | J2000 |
| Type: | S?[1] |
| Dist Ly: | NaNMpc |
| Z: | 0.022235 |
| H Radial V: | 6666 ± 4 km/s |
| Appmag V: | 13.1 |
| Size V: | 0.9' x 0.5' |
| Size: | ~31.44kpc (estimated) |
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). It was discovered by American astronomer Lewis Swift on 11 July 1883.[2]
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]