Coordinates: Sky map 01h 59m 19.6s, +19° 00′ 27″

NGC 772

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NGC 772
NGC772 - Noirlab2209a.jpg
NGC 772 imaged by the Gemini Observatory
Observation data (J2000 epoch)
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]
Apparent size (V)7′.2 × 4′.3[1]
Other designations
UGC 1466,[1] PGC 7525,[1] Arp 78[1]

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


Around 200,000 light years in diameter, NGC 772 is twice the size of 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[edit]


  1. ^ a b c d e f g h i "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". 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". Retrieved 11 November 2019.

External links[edit]