Astronomy:NGC 772

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NGC 772
NGC 772 imaged by the Gemini Observatory[1]
Observation data (J2000 epoch)
ConstellationAries
Right ascension 01h 59m 19.5443s[2]
Declination+19° 00′ 27.751″[2]
Redshift0.008236[2]
Helio radial velocity2469 ± 2 km/s[2]
Distance105.7 ± 7.5 Mly (32.42 ± 2.29 Mpc)[2]
Apparent magnitude (V)11.1[2]
Characteristics
TypeSA(s)b[2]
Size~204,000 ly (62.56 kpc) (estimated)[2]
Apparent size (V)7.2′ × 4.3′[2]
Other designations
IRAS 01565+1845, Arp 78, UGC 1466, MCG+03-06-011, PGC 7525[2]

NGC 772 (also known as Arp 78 or the Fiddlehead Galaxy[3]) is a large unbarred spiral galaxy approximately 106 million light-years away in the constellation Aries. It was discovered by German-British astronomer William Herschel on 29 November 1785.[4][5]

Characteristics

At around 200,000 light years in diameter, NGC 772 is somewhat larger than the Milky Way Galaxy,[6] 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.[7]

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. https://noirlab.edu/public/news/noirlab2209/. 
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 "Results for object NGC 0772". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+0772. 
  3. ↑ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579. http://www.deep-sky-atlas.com/. 
  4. ↑ 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. doi:10.1098/rstl.1789.0021. Bibcode: 1789RSPT...79..212H. 
  5. ↑ Seligman, Courtney. "NGC 772". https://cseligman.com/text/atlas/ngc7a.htm#772. 
  6. ↑ 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. 
  7. ↑ 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. doi:10.1086/313041. Bibcode: 1997ApJS..112..315H. 
  8. ↑ Moore, M.; Li, W.; Boles, T. (2003). "Supernovae 2003hg, 2003hh, 2003hi, 2003hj, 2003hk, 2003hl". International Astronomical Union Circular (8184): 2. Bibcode: 2003IAUC.8184....2M. http://www.cbat.eps.harvard.edu/iauc/08100/08184.html#Item2. 
  9. ↑ "SN 2003hl". IAU. https://www.wis-tns.org/object/2003hl. 
  10. ↑ Yamaoka, H.; Ayani, K. (2003). "Supernovae 2003hl and 2003iq in NGC 772". International Astronomical Union Circular (8219): 2. Bibcode: 2003IAUC.8219....2Y. http://www.cbat.eps.harvard.edu/iauc/08200/08219.html#Item2. 
  11. ↑ "NGC 772, Supernovae 2003hl and 2003iq". http://www.kopernik.org/images/archive/n772.htm. 
  12. ↑ "SN 2003iq". IAU. https://www.wis-tns.org/object/2003iq. 
  13. ↑ Bishop, David. "Supernovae 2003hl and 2003iq in NGC 772". https://www.rochesterastronomy.org/sn2003/sn2003hl.html. 
  14. ↑ "SN 2022qze". IAU. https://www.wis-tns.org/object/2022qze. 
  15. ↑ "A Rival to the Milky Way" (in en). https://esahubble.org/images/potw1945a/. 

Template:NGC objects:500-999


Coordinates: Sky map 01h 59m 19.5443s, +19° 00′ 27.751″



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