NGC 4475
Galaxy in the constellation Coma Berenices
From Wikipedia, the free encyclopedia
NGC 4475 is a spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 7,681±20 km/s, which corresponds to a Hubble distance of 369.5 ± 25.9 Mly (113.29 ± 7.94 Mpc).[1] However, 12 non-redshift measurements give a closer mean distance of 327.60 ± 10.87 Mly (100.442 ± 3.334 Mpc).[2] It was discovered by German-British astronomer William Herschel on 11 April 1785.[3][4]
Right ascension12h 29m 47.5825s[1]
Declination+27° 14′ 36.039″[1]
| NGC 4475 | |
|---|---|
NGC 4475 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 29m 47.5825s[1] |
| Declination | +27° 14′ 36.039″[1] |
| Redshift | 0.024660±0.000005[1] |
| Heliocentric radial velocity | 7,393±1 km/s[1] |
| Distance | 327.60 ± 10.87 Mly (100.442 ± 3.334 Mpc)[1] |
| Apparent magnitude (V) | 14.3g[1] |
| Characteristics | |
| Type | SAbc[1] |
| Size | ~190,600 ly (58.43 kpc) (estimated)[1] |
| Apparent size (V) | 1.65′ × 0.87′[1] |
| Other designations | |
| UGC 7632, MCG +05-30-008, PGC 41225, CGCG 159-008[1] | |
Supernovae
Two supernovae have been observed in NGC 4475:
- SN 2021acnd (Type II, mag. 18.79) was discovered by the Zwicky Transient Facility on 25 October 2021.[5]
- SN 2025nat (Type II, mag. 18.362) was discovered by ATLAS on 7 June 2025.[6]
