NGC 1642
Galaxy in the constellation Taurus
From Wikipedia, the free encyclopedia
NGC 1642 is a spiral galaxy in the constellation of Taurus. Its velocity with respect to the cosmic microwave background is 4575 ± 3 km/s, which corresponds to a Hubble distance of 220.1 ± 15.4 Mly (67.48 ± 4.72 Mpc).[1] However, one non-redshift measurement gives a much closer distance of 69 Mly (21.3 Mpc).[2] It was discovered by German astronomer Heinrich d'Arrest on 29 December 1861.[3]
Right ascension04h 42m 54.9213s[1]
Declination+00° 37′ 07.198″[1]
| NGC 1642 | |
|---|---|
NGC 1642 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Taurus |
| Right ascension | 04h 42m 54.9213s[1] |
| Declination | +00° 37′ 07.198″[1] |
| Redshift | 0.015419[1] |
| Heliocentric radial velocity | 4622 ± 0 km/s[1] |
| Distance | 220.1 ± 15.4 Mly (67.48 ± 4.72 Mpc)[1] |
| Group or cluster | NGC 1762 group (LGG 120) |
| Apparent magnitude (V) | 12.6[1] |
| Characteristics | |
| Type | SA(rs)c[1] |
| Size | ~42,400 ly (13.01 kpc) (estimated)[1] |
| Apparent size (V) | 1.7′ × 1.2′[1] |
| Other designations | |
| IRAS 04403+0031, 2MASX J04425489+0037070, UGC 3140, MCG +00-12-072, PGC 15867, CGCG 393-073[1] | |
NGC 1762 Group
Supernova
One supernova has been observed in NGC 1642:
- SN 2023bhm (Type Ia-91bg-like, mag. 18.1) was discovered by the Zwicky Transient Facility on 2 February 2023.[6]
