Deer Lick Group and Stephan's quintet (Richard Francis)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7317 · NGC 7318 · NGC 7319 · NGC 7320 · NGC 7331 · NGC 7333 · NGC 7335 · NGC 7336 · NGC 7337 · NGC 7338 · NGC 7340 · NGC 7343 · Stephan's Quintet

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Deer Lick Group and Stephan's quintet

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Deer Lick Group and Stephan's quintet

This image shows two groups of galaxies in the constellation Pegasus. In the upper left part is the "Deer Lick" group, with the prominent spiral galaxy NGC 7331 in the foreground. At the lower right is group called Stephan's Quintet.

The Deer Lick group was named after the Deer Lick Gap in the North Carolina mountains, after amateur Tom Lorenzin had a particularly good view of it from there. NGC 7331 is the most prominent member of the group but is much closer at about 40 million light years. It was discovered by William Herschel in 1784. The four other galaxies which make up the group are almost ten times further away, at distances from 294 to 365 million light years. This spread of distances means that they are not a real galaxy group. These four are sometimes referred to as the "fleas". NGC 7331 is similar in size to our Milky Way galaxy but has some odd features: its central bulge appears not to be fully centred in the disk, and it rotates in the opposite direction to the rest of the disk.

Stephan's Quintet is named after Édouard Stephan who discovered the group in 1877 from the Marseilles Observatory, almost a hundred years after Herschel's discovery of NGC 7331. This was the first compact galaxy group discovered, though one of them (NGC 7320) is about 40 million light years from the others and not a true member of the group. The other four are interacting gravitationally, as can be deduced from their odd shapes, and are about 210 – 340 million light years away.

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Astrophotographes (France)
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Status	Advanced success
Started	...
Astrometry.net job	5358009
PixInsight job	EBHEWFP986A4H0QJXA29VSM2BHMOOLCJ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h36m56s.792
RA (top/left)	22h39m21s.817
RA (top/right)	22h34m32s.210
RA (bottom/right)	22h34m33s.279
RA (bottom/left)	22h39m19s.700

Dec (center)	+34°17′02″.74
Dec (top/left)	+34°46′37″.40
Dec (top/right)	+34°46′46″.80
Dec (bottom/right)	+33°47′12″.51
Dec (bottom/left)	+33°47′08″.41

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Deer Lick Group and Stephan's quintet

Deer Lick Group and Stephan's quintet

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Deer Lick Group and Stephan's quintet

Deer Lick Group and Stephan's quintet

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