NGC 7331, Deer Lick Group and Stephan's Quintet (Pete Strakey)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7317 · NGC 7318 · NGC 7319 · NGC 7320 · NGC 7327 · NGC 7331 · NGC 7335 · NGC 7336 · NGC 7337 · NGC 7340

NGC 7331, Deer Lick Group and Stephan's Quintet, Pete Strakey

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NGC 7331, Deer Lick Group and Stephan's Quintet

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NGC 7331, Deer Lick Group and Stephan's Quintet

Celestron Edge HD with focal reducer (f=1400mm)Canon 500D (cooled) with UV/IR cut filterLosmandy G11 mount6 hours of imaging from my drivewayNGC 7331 Group (right side of image) is a visual grouping of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is a foreground galaxy in the same field as the collection, which is also called the Deer Lick Group. 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. 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.Stephan's Quintet (left side of image) is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group, visible in the constellation Pegasus, was discovered by Édouard Stephan in 1877 at the Marseille Observatory. The group is the most studied of all the compact galaxy groups. The brightest member of the visual grouping (and the only non-member of the true group) is NGC 7320, which has extensive H II regions, identified as red blobs, where active star formation is occurring. From Wikipedia

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NGC 7331, Deer Lick Group and Stephan's Quintet

NGC 7331, Deer Lick Group and Stephan's Quintet

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NGC 7331, Deer Lick Group and Stephan's Quintet

NGC 7331, Deer Lick Group and Stephan's Quintet

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