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The Details
Deer Lick Group and Stephan's Quintet in Pegasus
Astro-Physics 160 EDF Refractor at f/7.5
Astro-Physics 1200 GTO
Tru-Balance LRGB filter set
07 September 2007, 08 September 2007
Grandview Campground Area, White Mountains, Eastern California
L 11 x 300 sec 1x1 bin; RGB 6 x 300 sec, 1x1 bin
Maxim DL/CCD, Registar, Photoshop CS2
Field of View: 54'15" x 36'321" centered on RA 22h36m35.4s
DEC +34°12'42” (2000.0) . North angle 118.20°; east 90° CCW from north

The Deer Lick Group and Stephan’s Quintet are two well known and unrelated galaxy groupings in the constellation Pegasus. The Deer Lick Group is dominated by the large spiral galaxy NGC 7331, located on the right side of the above image. The smaller galaxies NGC 7335, 7336, 7337 and 7340 appearing to hover around it like bees around a hive are nearly ten times further away than NGC 7331. These galaxies just happen to lie in our line of sight with NGC 7331, but are not gravitationally linked in any way with the giant spiral. NGC 7331 is about 47 million light years from Earth and is a very large spiral having a total mass of about 300 million Suns and a diameter of about 130000 light years across. Stephan’s Quintet is a much more distant galaxy group, lying about 300 million light years from Earth. Although it is called a quintet, in reality only four of its members are actually interacting, with one a much closer galaxy that just happens to be in the line of sight from our vantage point. The large, bluish spiral NGC 7320, seen at an 11 o’clock position from the “center” of the Quintet is the foreground galaxy, it being about 40 million light years away. The two largest members of Stephan’s Quintet can be seen with tidal “tails” resulting from past interactions between these galaxies.




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