| NGC 873 | |
|---|---|
 NGC 873 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 16m 32.3511s[1] |
| Declination | −11° 20′ 54.477″[1] |
| Redshift | 0.013403±0.0000140[1] |
| Heliocentric radial velocity | 4,018±4 km/s[1] |
| Distance | 181.7 ± 12.8 Mly (55.70 ± 3.91 Mpc)[1] |
| Group or cluster | NGC 835 Group (LGG 49) |
| Apparent magnitude (V) | 12.83[1] |
| Characteristics | |
| Type | Sc pec[1] |
| Size | ~86,300 ly (26.47 kpc) (estimated)[1] |
| Apparent size (V) | 1.6′ × 1.3′[1] |
| Other designations | |
| IRAS 02140-1134, 2MASX J02163235-1120549, MCG -02-06-048, PGC 8692[1] | |
NGC 873 is a peculiar spiral galaxy in the constellation of Cetus. Its velocity with respect to the cosmic microwave background is 3,777±17 km/s, which corresponds to a Hubble distance of 181.7 ± 12.8 Mly (55.70 ± 3.91 Mpc).[1] It was discovered by German-British astronomer William Herschel on 27 November 1785.[2][3]
NGC 873 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[4][5]
NGC 835 group
[edit]NGC 873 is a member of the NGC 835 galaxy group (also known as LGG 49). The other galaxies in the group are NGC 833, NGC 835, NGC 838, NGC 839, NGC 848, and UGCA 23.[6][7]
Supernova
[edit]One supernova has been observed in NGC 873:
- SN 2022xjk (Type II, mag. 17.414) was discovered by the Zwicky Transient Facility on 12 October 2022.[8]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "Results for object NGC 873". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 16 December 2025.
- ^ Herschel, William (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London. 79: 212–255. Bibcode:1789RSPT...79..212H. doi:10.1098/rstl.1789.0021.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 873". Celestial Atlas. Retrieved 16 December 2025.
- ^ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
- ^ "NGC 873". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 December 2025.
- ^ 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 49". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 December 2025.
- ^ "SN 2022xjk". Transient Name Server. IAU. Retrieved 16 December 2025.
External links
[edit]
Media related to NGC 873 at Wikimedia Commons- NGC 873 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
