Astronomy:NGC 4172
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| NGC 4172 | |
|---|---|
| File:NGC 4172 SDSS.jpg 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] |
| Helio 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 | |
| UGC 7205, MCG+09-20-109, PGC 38887[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
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 4172". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+4172.
- ↑ "Distance Results for NGC 4172". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4172.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 4172". https://cseligman.com/text/atlas/ngc41a.htm#4172.
- ↑ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M. et al. (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. doi:10.1088/0004-637X/788/1/45. Bibcode: 2014ApJ...788...45T.
- ↑ "NGC 4172". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4172.
- ↑ Madison, D. R.; Ponticello, N. J.; Li, W.; Newton, J.; Cox, L.; Puckett, T.; Gonzalez, S.; Tokimasa, N. et al. (2006). "Supernova 2006ax, 2006ay, 2006az". International Astronomical Union Circular (8691): 2. Bibcode: 2006IAUC.8691....2M. http://www.cbat.eps.harvard.edu/iauc/08600/08691.html#Item2.
- ↑ "SN 2006az". IAU. https://www.wis-tns.org/object/2006az.
External links
- NGC 4172 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
12h 12m 14.9210s, +56° 10′ 39.053″
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