| NGC 1642 | |
|---|---|
 The spiral galaxy NGC 1642 | |
| Observation data (J2000epoch) | |
| 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] |
| 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 1642 is aspiral galaxy in theconstellation ofTaurus. Its velocity with respect to thecosmic microwave background is 4575 ± 3 km/s, which corresponds to aHubble distance of 220.1 ± 15.4 Mly (67.48 ± 4.72 Mpc).[1] However, onenon-redshift measurement gives a much closer distance of 69 Mly (21.3 Mpc).[2] It was discovered byGerman astronomerHeinrich d'Arrest on 29 December 1861.[3]
Onesupernova has been observed in NGC 1642: SN 2023bhm (type Ia-91bg-like, mag. 18.1) was discovered by theZwicky Transient Facility on 2 February 2023.[4]
According to A.M. Garcia, the galaxy NGC 1642 is part of the NGC 1762 group (also known asLGG 120) that includes at least 27 galaxies, includingIC 392,NGC 1590,NGC 1633,NGC 1691,NGC 1713,NGC 1719, andNGC 1762, among others.[5]
Media related toNGC 1642 at Wikimedia Commons
