NGC 7331 Group

NGC 7331 Group is a visual grouping of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is the brightest member of the collection, which is also called the Deer Lick Group,.[1] It contains four other members, affectionately referred to as the "fleas”: the lenticular or unbarred spirals NGC 7335 and 7336, the barred spiral galaxy NGC 7337 and the elliptical galaxy NGC 7340. These galaxies lie at distances of approximately 332, 365, 348 and 294 million light years, respectively.[2] Although adjacent on the sky, this collection is not a galaxy group, as NGC 7331 itself is not gravitationally associated with the far more distant “fleas”; indeed, even they are separated by far more than the normal distances (~2 Mly) of a galaxy group.

NGC 7331 Group
NGC 7331, along with NGC 7335, 7336, 7337 and 7340
Observation data (Epoch J2000)
Constellation(s)Pegasus
Right ascension 22h 37m
Declination+34° 25′
Brightest memberNGC 7331
Other designations
NGC 7331 Group, LGG 459, Deer Lick Group

See also
  • "NAME NGC 7331 Group". SIMBAD. Centre de données astronomiques de Strasbourg.
  • ADS: The NGC 7331 Group, a Stable Group of Galaxies Projected on Stephan's Quartet
  • Nemiroff, R.; Bonnell, J., eds. (12 July 2008). "NGC 7331 and Beyond". Astronomy Picture of the Day. NASA.
  • NGC 7331 Group on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • 3–10 October 2008: Andromeda Galaxy (M31), Gamma Andromedae, and the NGC 7331 Group on Astronomy.com blog
  • NGC 7331 Group at de-regt.com

References
  1. Saratoga Skies, "NGC 7331 (Deer Lick Group and Stephan's Quintet)", Jim Solomon (accessed 7 May 2009)
  2. "Spiral Galaxy NGC 7331, Galaxy Group (NGC 7335, 7336, 7337)".
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