NGC 1642
| 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 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]
NGC 1762 Group
[edit]According to A.M. Garcia, the galaxy NGC 1642 is part of the NGC 1762 group (also known as LGG 120) that includes at least 27 galaxies, including IC 392, NGC 1590, NGC 1633, NGC 1691, NGC 1713, NGC 1719, and NGC 1762, among others.[4][5]
Supernova
[edit]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]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "Results for object NGC 1642". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 28 July 2024.
- ^ "Distance Results for NGC 1642". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 13 December 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 1642". Celestial Atlas. Retrieved 13 December 2024.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
- ^ "LGG 120". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 December 2025.
- ^ "SN 2023bhm". Transient Name Server. IAU. Retrieved 13 December 2024.
External links
[edit]
Media related to NGC 1642 at Wikimedia Commons- NGC 1642 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
