NGC 4172
| NGC 4172 | |
|---|---|
NGC 4172 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 12h 12m 14.9210s[1] |
| Declination | +56° 10′ 39.053″[1] |
| Redshift | 0.030983±0.00000344[1] |
| Heliocentric radial velocity | 9,289±1 km/s[1] |
| Distance | 431.86 ± 14.35 Mly (132.409 ± 4.400 Mpc)[1] |
| Apparent magnitude (V) | 13.9g[1] |
| Characteristics | |
| Type | S[1] |
| Size | ~184,400 ly (56.55 kpc) (estimated)[1] |
| Apparent size (V) | 1.04′ × 0.98′[1] |
| Other designations | |
| 2MASX J12121490+5610386, UGC 7205, MCG +09-20-109, PGC 38887, CGCG 269-039[1] | |
NGC 4172 is a spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 9,449±11 km/s, which corresponds to a Hubble distance of 454.6 ± 31.8 Mly (139.37 ± 9.76 Mpc).[1] Additionally, 11 non-redshift measurements give a closer mean distance of 431.86 ± 14.35 Mly (132.409 ± 4.400 Mpc).[2] It was discovered by German-British astronomer William Herschel on 14 April 1789.[3]
NGC 4172 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4][5]
Supernova
One supernova has been observed in NGC 4172:
- SN 2006az (Type Ia, mag. 17.1) was discovered by Jack B. Newton, L. Cox, and Tim Puckett on 23 March 2006.[6][7]
See also
References
- ^ a b c d e f g h i j k "Results for object NGC 4172". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 10 February 2026.
- ^ "Distance Results for NGC 4172". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 10 February 2026.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 4172". Celestial Atlas. Retrieved 10 February 2026.
- ^ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M.; Oi, N.; Ohyama, Y.; Takita, S.; Yamauchi, C.; Yano, K. (2014). "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey". The Astrophysical Journal. 788 (1): 45. arXiv:1404.4937. Bibcode:2014ApJ...788...45T. doi:10.1088/0004-637X/788/1/45.
- ^ "NGC 4172". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2026.
- ^ Madison, D. R.; Ponticello, N. J.; Li, W.; Newton, J.; Cox, L.; Puckett, T.; Gonzalez, S.; Tokimasa, N.; Naito, H.; Yamaoka, H. (2006). "Supernova 2006ax, 2006ay, 2006az". International Astronomical Union Circular (8691): 2. Bibcode:2006IAUC.8691....2M.
- ^ "SN 2006az". Transient Name Server. IAU. Retrieved 10 February 2026.
External links
- Media related to NGC 4172 at Wikimedia Commons
- NGC 4172 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images