NGC 4632
Galaxy in the constellation Virgo
From Wikipedia, the free encyclopedia
NGC 4632 is a spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background for is 2,061±24 km/s, which corresponds to a Hubble distance of 99.2 ± 7.0 Mly (30.40 ± 2.16 Mpc).[1] However, 15 non-redshift measurements give a much closer distance of 54.12 ± 3.04 Mly (16.593 ± 0.931 Mpc).[2] It was discovered by German-British astronomer William Herschel on 22 February 1784.[3]
| NGC 4632 | |
|---|---|
NGC 4632 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 42m 31.9896s[1] |
| Declination | −00° 04′ 57.684″[1] |
| Redshift | 0.005741[1] |
| Heliocentric radial velocity | 1,721±2 km/s[1] |
| Distance | 99.2 ± 7.0 Mly (30.40 ± 2.16 Mpc)[1] |
| Group or cluster | NGC 4666 Group (LGG 299) |
| Apparent magnitude (V) | 11.7[1] |
| Characteristics | |
| Type | SAc[1] |
| Size | ~50,400 ly (15.45 kpc) (estimated)[1] |
| Apparent size (V) | 3.0′ × 1.2′[1] |
| Other designations | |
| IRAS 12399+0011, UGC 7870, MCG +00-32-038, PGC 42689, CGCG 014-110[1] | |
Polar Ringed Galaxy
It was discovered in 2023 that the galaxies NGC 4632 and NGC 6156 are surrounded by a disk of cold hydrogen orbiting 90 degrees around their disks.[4] These are the very first polar-ringed galaxies discovered through radio wave observations.[5] These observations were made as part of the WALLABY astronomical survey.
NGC 4666 Group
According to A. M. Garcia, NGC 4632 is a member of the NGC 4666 Group (also known as LGG 299). This group has 3 members, including NGC 4666 and NGC 4668.[6][7]
Supernova
One supernova has been observed in NGC 4632:
- SN 1946B (Type II, mag. 15.7) was discovered by Edwin Hubble in May, 1946.[8][9]
