Astronomy:NGC 7321
| NGC 7321 | |
|---|---|
 NGC 7321 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 22h 36m 28.0108s[1] |
| Declination | +21° 37′ 18.648″[1] |
| Redshift | 0.023843±0.0000120[1] |
| Helio radial velocity | 7,148±4 km/s[1] |
| Distance | 297.50 ± 14.14 Mly (91.214 ± 4.334 Mpc)[2] |
| Apparent magnitude (V) | 13.71[1] |
| Characteristics | |
| Type | SB(r)b[1] |
| Size | ~147,100 ly (45.11 kpc) (estimated)[1] |
| Apparent size (V) | 1.6′ × 1.1′[1] |
| Other designations | |
| HOLM 793A, IRAS 22340+2121, UGC 12103, MCG+03-57-021, PGC 69287[1] | |
NGC 7321 is a barred spiral galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 6,793±25 km/s, which corresponds to a Hubble distance of 326.8 ± 22.9 Mly (100.19 ± 7.02 Mpc).[1] However, seven non-redshift measurements give a closer mean distance of 297.50 ± 14.14 Mly (91.214 ± 4.334 Mpc).[2] It was discovered by German-British astronomer William Herschel on 17 November 1784.[3][4]
NGC 7321 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[5][6]
Galaxy group
According to M. J. Geller and J. P. Huchra, NGC 7321 is a member of a galaxy group which contains 2 other galaxies: NGC 7316 and NGC 7323 (fr).[7]
Supernovae
Two supernovae have been observed in NGC 7321:
- SN 2008gj (Type Ic, mag. 18.2) was discovered by the Lick Observatory Supernova Search (LOSS) on 19 October 2008.[8][9]
- SN 2013di (Type Ia, mag. 18.2) was discovered by the Catalina Real-time Transient Survey on 12 June 2013.[10][11]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 7321". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+7321.
- ↑ 2.0 2.1 "Distance Results for NGC 7321". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+7321.
- ↑ Herschel, William (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 76: 457–499. doi:10.1098/rstl.1786.0027. Bibcode: 1786RSPT...76..457H. https://zenodo.org/record/1432282/files/article.pdf.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7321". https://cseligman.com/text/atlas/ngc73.htm#7321.
- ↑ García-Lorenzo, B. et al. (2015). "Ionized gas kinematics of galaxies in the CALIFA survey. I. Velocity fields, kinematic parameters of the dominant component, and presence of kinematically distinct gaseous systems". Astronomy and Astrophysics 573: A59. doi:10.1051/0004-6361/201423485. Bibcode: 2015A&A...573A..59G.
- ↑ "NGC 7321". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7321.
- ↑ Geller, M. J.; Huchra, J. P. (1983). "Groups of galaxies. III. THe CfA survey". The Astrophysical Journal Supplement Series 52: 61. doi:10.1086/190859. Bibcode: 1983ApJS...52...61G.
- ↑ Rex, J.; Li, W.; Cenko, S. B.; Filippenko, A. V. (2008). "Supernova 2008gj in NGC 7321". Central Bureau Electronic Telegrams (1541): 1. Bibcode: 2008CBET.1541....1R. http://www.cbat.eps.harvard.edu/iau/cbet/001500/CBET001541.txt.
- ↑ "SN 2008gj". IAU. https://www.wis-tns.org/object/2008gj.
- ↑ Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, M. et al. (2013). "Supernova 2013di in NGC 7321 = PSN J22362746+2136543". Central Bureau Electronic Telegrams (3562): 1. Bibcode: 2013CBET.3562....1H.
- ↑ "SN 2013di". IAU. https://www.wis-tns.org/object/2013di.
External links
- NGC 7321 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
22h 36m 28.0108s, +21° 37′ 18.648″
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