NGC 7154
| NGC 7154 | |
|---|---|
 NGC 7154 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Piscis Austrinus |
| Right ascension | 21h 55m 21.1700s[1] |
| Declination | −34° 48′ 51.697″[1] |
| Redshift | 0.008726±0.000010[1] |
| Heliocentric radial velocity | 2,616±3 km/s[1] |
| Distance | 89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc)[2] |
| Group or cluster | IC 5156 group (LGG 450) |
| Apparent magnitude (V) | 13.14[1] |
| Characteristics | |
| Type | SB(s)m pec[1] |
| Size | ~86,400 ly (26.48 kpc) (estimated)[1] |
| Apparent size (V) | 2.1′ × 1.6′[1] |
| Other designations | |
| ESO 404- G 008, IRAS 21523-3503, 2MASX J21552103-3448507, MCG -06-48-005, PGC 67641[1] | |
NGC 7154 is a peculiar barred spiral galaxy in the constellation of Piscis Austrinus. Its velocity with respect to the cosmic microwave background is 2,356±18 km/s, which corresponds to a Hubble distance of 105.3 ± 7.5 Mly (32.3 ± 2.3 Mpc).[1] However, eight non-redshift measurements give a closer mean distance of 89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc).[2] It was discovered by British astronomer John Herschel on 23 September 1834.[3]
NGC 7154 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]
IC 5156 group
[edit]NGC 7154 is a member of the IC 5156 group (also known as LGG 450[6]). This group contains 14 galaxies, including NGC 7163, NGC 7172, NGC 7173, NGC 7174, NGC 7176, NGC 7187, IC 5156, and six galaxies from the ESO catalogue.[7][8]
Supernova
[edit]One supernova has been observed in NGC 7154:
See also
[edit]References
[edit]- 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 7154". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 April 2026.
- 1 2 "Distance Results for NGC 7154". NASA/IPAC Extragalactic Database. NASA. Retrieved 5 April 2026.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7154". Celestial Atlas. Retrieved 5 April 2026.
- ↑ 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 7154". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 April 2026.
- ↑ "General study of group membership. II. Determination of nearby groups". 19 November 1993.
- ↑ 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 450". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 April 2026.
- ↑ "SN 2026hze". Transient Name Server. IAU. Retrieved 5 April 2026.
External links
[edit]
Media related to NGC 7154 at Wikimedia Commons- NGC 7154 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
