| NGC 4375 | |
| Constellation Name: | Coma Berenices |
| Epoch: | J2000 |
| Type: | SB(r)ab pec?[1] |
| Dist Ly: | NaNMpc |
| Z: | 0.030153 |
| H Radial V: | 9040 ± 3 km/s |
| Appmag V: | 12.6 |
| Size V: | 1.4' x 1.2' |
| Size: | ~45.37kpc (estimated) |
NGC 4375 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 9325 ± 20 km/s, which corresponds to a Hubble distance of 137.54 ± 9.63 Mpc (∼448 million light-years). However, four non-redshift measurements give a distance of 105.5 Mpc (~344 million light-years).[2] The galaxy was discovered by German-British astronomer William Herschel on 11 April 1785.[3]
The SIMBAD database lists NGC 4375 as a Seyfert II Galaxy, i.e. it has a quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4]
Two supernovae have been observed in NGC 4375: SN 1960J (type unknown, mag. 18.5)[5] [6] and SN 2023vsr (type II, mag. 17.6).[7]