NGC 7321

NGC 7321
NGC 7321 imaged by SDSS
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension22h 36m 28.0108s[1]
Declination+21° 37′ 18.648″[1]
Redshift0.023843±0.0000120[1]
Heliocentric radial velocity7,148±4 km/s[1]
Distance297.50 ± 14.14 Mly (91.214 ± 4.334 Mpc)[2]
Apparent magnitude (V)13.71[1]
Characteristics
TypeSB(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, 2MASX J22362802+2137186, UGC 12103, MCG +03-57-021, PGC 69287, CGCG 452-031[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.[7]

Supernovae

Two supernovae have been observed in NGC 7321:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 7321". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 June 2026.
  2. 1 2 "Distance Results for NGC 7321". NASA/IPAC Extragalactic Database. NASA. Retrieved 18 June 2026.
  3. ↑ Herschel, William (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars" (PDF). Philosophical Transactions of the Royal Society of London. 76: 457–499. Bibcode:1786RSPT...76..457H. doi:10.1098/rstl.1786.0027.
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7321". Celestial Atlas. Retrieved 18 June 2026.
  5. ↑ 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. arXiv:1408.5765. Bibcode:2015A&A...573A..59G. doi:10.1051/0004-6361/201423485.
  6. ↑ "NGC 7321". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 June 2026.
  7. ↑ Geller, M. J.; Huchra, J. P. (1983). "Groups of galaxies. III. THe CfA survey". The Astrophysical Journal Supplement Series. 52: 61. Bibcode:1983ApJS...52...61G. doi:10.1086/190859.
  8. ↑ 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.
  9. ↑ "SN 2008gj". Transient Name Server. IAU. Retrieved 18 June 2026.
  10. ↑ Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, M.; McNaught, R. H.; Christensen, E.; Larson, S. M.; Cenko, S. B.; Tucker, B. E.; Shivvers, I.; Clubb, K. I.; Filippenko, A. V. (2013). "Supernova 2013di in NGC 7321 = PSN J22362746+2136543". Central Bureau Electronic Telegrams (3562): 1. Bibcode:2013CBET.3562....1H.
  11. ↑ "SN 2013di". Transient Name Server. IAU. Retrieved 18 June 2026.
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