NGC 7331 Galaxy in Pegasus (Dale A Chamberlain)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7327 · NGC 7331 · NGC 7333 · NGC 7335 · NGC 7336 · NGC 7337 · NGC 7338 · NGC 7340 · PGC 2051985 · PGC 69281 · PGC 69291

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NGC 7331 Galaxy in Pegasus

Link: https://chamberlainobservatory.com/ngc-7331-spiral-galaxy-in-pegasus/

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NGC 7331 Galaxy in Pegasus

Link: https://chamberlainobservatory.com/ngc-7331-spiral-galaxy-in-pegasus/

NGC 7331 is the brightest galaxy in Pegasus. This spiral galaxy was one of William Herschel's earliest discoveries over 200 years ago. Although visible in large binoculars, it was missed by Messier. In many respects this galaxy resembles the famous, much-elongated, Andromeda Galaxy, M-31. This appearance is caused by its nearly edge-on alignment. NGC 7331 is rich in H-II (glowing Hydrogen/star forming) regions, like M-42 in our Milky Way Galaxy.

Early observers of the 18th and 19th centuries classified what we now know are galaxies as "spiral nebulae". They noticed that these "spiral nebulae" are often accompanied by smaller, fainter neighbors. NGC 7331 is no exception. Various 19th Century observers reported the presence of eight suspected companions. Modern observations support the likelihood of a true galaxy cluster in the background, but NGC 7331 is probably not involved, and is much closer to us. Modern images show that five of the eight "companions" are just mis-identified stars or double stars. This error perhaps results from the poor telescopes used by the early observers. In addition to the true NGC galaxies in the image above, there is also a dimmer anonymous galaxy that is sometimes considered NGC 7325.

Radio emissions from the NGC 7331 area seem to engulf the nearby galaxy cluster, Stephan's Quintet, located about 1.5 degrees to the southwest. This, along with evidence of a very faint filament of material stretching between Stephan's Quintet and NGC 7331, argues for a past gravitational interaction. NGC 7320, the largest member of the Quintet, lies in the foreground of its more distant members, and is the most likely candidate for an ancient association with NGC 7331.

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Status	Advanced success
Started	...
Astrometry.net job	7131068
PixInsight job	EH5LP1CHXVZFVLJRF6DVUO0884P8FQQD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h37m15s.723
RA (top/left)	22h38m39s.720
RA (top/right)	22h37m16s.504
RA (bottom/right)	22h35m51s.380
RA (bottom/left)	22h37m14s.982

Dec (center)	+34°27′21″.35
Dec (top/left)	+34°19′55″.20
Dec (top/right)	+34°46′11″.58
Dec (bottom/right)	+34°34′45″.26
Dec (bottom/left)	+34°08′31″.16

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NGC 7331 Galaxy in Pegasus

NGC 7331 Galaxy in Pegasus

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NGC 7331 Galaxy in Pegasus

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