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NGC 772 (also known as Arp 78) is an unbarred spiral galaxy approximately 130 million light-years away in the constellation Aries.

NGC 772
NGC 772 imaged by the Gemini Observatory
Observation data (J2000 epoch)
ConstellationAries
Right ascension01h 59m 19.6s[1]
Declination+19° 00′ 27″[1]
Redshift2472 ± 3 km/s[1]
Distance130 Mly[citation needed]
Apparent magnitude (V)11.1[1]
Characteristics
TypeSA(s)b[1]
Apparent size (V)7′.2 × 4′.3[1]
Other designations
UGC 1466,[1] PGC 7525,[1] Arp 78[1]

Characteristics


At around 200,000 light years in diameter, NGC 772 is somewhat larger than the Milky Way Galaxy,[2] 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 than the others 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".

Two supernovae, SN 2003 hl (discovered August 20, 2003) and SN 2003 iq (discovered October 8th, 2003), have been observed in NGC 772. Both were Type II. [3]

NGC 772 probably has a H II nucleus, but it may be a transitional object.[4]




See also



References


  1. "NASA/IPAC Extragalactic Database". Results for NGC 772. Retrieved 2006-11-25.
  2. 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.
  3. "NGC 772, Supernovae 2003hl and 2003iq". www.kopernik.org. Retrieved 2022-04-08.
  4. 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.
  5. "A Rival to the Milky Way". www.spacetelescope.org. Retrieved 11 November 2019.


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На других языках

[de] NGC 772

NGC 772 ist die Bezeichnung einer Spiralgalaxie vom Typ Sb im Sternbild Widder auf der Ekliptik. Sie ist rund 114 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 240.000 Lichtjahren.
- [en] NGC 772

[es] NGC 772

NGC 772 es una galaxia espiral situada en la constelación de Aries a una distancia no demasiado bien conocida, pero que se calcula sobre la base de su desplazamiento al rojo que es de algo más de 100 millones de años luz, la cual de ser cierta convertiría a ésta en una galaxia muy luminosa, bastante más que Andrómeda e incluso que galaxias elípticas gigantes cómo las M49 o M87, y grande -con un diámetro de más de 200000 años luz-.[2]

[ru] NGC 772

NGC 772 (другие обозначения — UGC 1466, MCG 3-6-11, ZWG 461.18, KARA 80, Arp 78, IRAS01565+1845, PGC 7525) — спиральная галактика (Sb) в созвездии Овен[2].


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