NGC 772

NGC 772
NGC 772 imaged by the Gemini Observatory
Observation data (J2000 epoch)
ConstellationAries
Right ascension01h 59m 19.5443s
Declination+19° 00′ 27.751″
Redshift0.008236
Heliocentric radial velocity2,469±2 km/s
Distance105.7 ± 7.5 Mly (32.42 ± 2.29 Mpc)
Apparent magnitude (V)10.3
Characteristics
TypeSA(s)b
Size~204,000 ly (62.56 kpc) (estimated)
Apparent size (V)7.2′ × 4.3′
Other designations
IRAS 01565+1845, Arp 78, UGC 1466, MCG +03-06-011, PGC 7525, CGCG 461-018

NGC 772 is a large unbarred spiral galaxy approximately 106 million light-years away in the constellation Aries. Alternatively, it is known as Arp 78 or the Fiddlehead Galaxy. It was discovered by German-British astronomer William Herschel on 29 November 1785.

Characteristics

At around 200,000 light years in diameter, NGC 772 is somewhat larger than the Milky Way Galaxy, and is surrounded by several satellite galaxies – including the dwarf elliptical, NGC 770 – whose tidal forces on the larger galaxy have likely caused the emergence of a single elongated outer spiral arm that is much more developed and stronger than the other arms. Halton Arp includes NGC 772 in his Atlas of Peculiar Galaxies as Arp 78, where it is described as a "Spiral galaxy with a small high-surface brightness companion".

NGC 772 probably has a H II nucleus, but it may be a transitional object. NGC 772 is part of a galaxy group known as NGC 772 Group or LGG 40. NGC 772 Group has 4 members, NGC 772, NGC 770, UGC 1546 and UGC 1519.

Supernovae

Two supernovae in the galaxy (SN 2003hl & 2003iq) and asteroid 6223 Dahl passing through the shot

Three supernovae have been observed in NGC 772:

See also

References

  1. ↑ "Strong-Arming a Galaxy". NOIRLab. Retrieved 30 January 2023.
  2. 1 2 3 Finlay, Warren H. (2014). Concise Catalogue of Deep-Sky Objects. The Patrick Moore Practical Astronomy Series (2nd ed.). Springer Cham. p. 165. doi:10.1007/978-3-319-03170-5. ISBN 978-3-319-03169-9.
  3. 1 2 3 4 5 6 7 8 "Results for object NGC 0772". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2006-11-25.
  4. ↑ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  5. ↑ Herschel, W. (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London. 79: 212–255. Bibcode:1789RSPT...79..212H. doi:10.1098/rstl.1789.0021.
  6. ↑ Seligman, Courtney. "NGC 772". Celestial Atlas. Retrieved 17 August 2024.
  7. ↑ Rhee, M. H.; van Albada, T. S. (February 1996). "Short WSRT HI observations of spiral galaxies". Astronomy and Astrophysics Supplement. 115: 407–437. Bibcode:1996A&AS..115..407R.
  8. ↑ Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041. S2CID 17086638.
  9. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy & Astrophysics Supplement Series. 100: 47–90. Bibcode:1993A&AS..100...47G.
  10. ↑ Moore, M.; Li, W.; Boles, T. (2003). "Supernovae 2003hg, 2003hh, 2003hi, 2003hj, 2003hk, 2003hl". International Astronomical Union Circular (8184): 2. Bibcode:2003IAUC.8184....2M.
  11. ↑ "SN 2003hl". Transient Name Server. IAU. Retrieved 14 December 2024.
  12. ↑ Yamaoka, H.; Ayani, K. (2003). "Supernovae 2003hl and 2003iq in NGC 772". International Astronomical Union Circular (8219): 2. Bibcode:2003IAUC.8219....2Y.
  13. ↑ "NGC 772, Supernovae 2003hl and 2003iq". www.kopernik.org. Retrieved 2022-04-08.
  14. ↑ "SN 2003iq". Transient Name Server. IAU. Retrieved 14 December 2024.
  15. ↑ Bishop, David. "Supernovae 2003hl and 2003iq in NGC 772". Rochester Astronomy. Retrieved 14 December 2024.
  16. ↑ "SN 2022qze". Transient Name Server. IAU. Retrieved 14 December 2024.
  17. ↑ "A Rival to the Milky Way". ESA Hubble. Retrieved 11 November 2019.