NGC 4375
Galaxy in the constellation Coma Berenices
From Wikipedia, the free encyclopedia
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).[1] However, four non-redshift measurements give a closer 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]
| NGC 4375 | |
|---|---|
NGC 4375 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 25m 00.4734s[1] |
| Declination | +28° 33′ 30.952″[1] |
| Redshift | 0.030153 [1] |
| Heliocentric radial velocity | 9040 ± 3 km/s[1] |
| Distance | 448.6 ± 31.4 Mly (137.54 ± 9.63 Mpc)[1] |
| Apparent magnitude (V) | 12.6[1] |
| Characteristics | |
| Type | SB(r)ab pec?[1] |
| Size | ~148,000 ly (45.37 kpc) (estimated)[1] |
| Apparent size (V) | 1.4′ × 1.2′[1] |
| Other designations | |
| IRAS 12224+2850, 2MASX J12250049+2833306, UGC 7496, MCG +05-29-080, PGC 40449, CGCG 158-100[1] | |
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]
Supernovae
Two supernovae have been observed in NGC 4375:
- SN 1960J (type unknown, mag. 18.5) was discovered by Milton Humason on 18 June 1960.[5][6]
- SN 2023vsr (Type II, mag. 17.6478) was discovered by the Zwicky Transient Facility on 24 October 2023.[7]
