NGC507 cluster (lowenthalm)

Celestial hemisphere: Northern · Constellation: Pisces (Psc) · Contains: IC 1685 · IC 1687 · NGC 494 · NGC 495 · NGC 496 · NGC 498 · NGC 499 · NGC 501 · NGC 503 · NGC 504 · NGC 507 · NGC 508 · NGC 510 · NGC 515 · PGC 169765 · PGC 169770 · PGC 169773 · PGC 169775 · PGC 169777 · PGC 197581 · PGC 197582 · PGC 197585 · PGC 197586 · PGC 2028659 · PGC 2029622 · PGC 2034074 · PGC 5026 · PGC 5061 · PGC 5100 · PGC 5102 · And 9 more.

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NGC507 cluster

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NGC507 cluster

Galaxy clusters do not get the love they deserve. They are best when seeing is good to very good, so you can see all the big galaxy's little friends. This image is a perfect example of such a wonderful galaxy cluster on the border between Pisces and Andromeda. Its actually a stack of two live-stacked images, which is why the dark borders have an odd non-square shape. The star of the show is the enormous NGC 507 at the bottom of the field. About 240 mly distant, which looks to be at least 5 arc minutes across across its dim outer halo - it would seem to be more than 300 thousand ly across. Note its colorful entourage of several dozen little faint dwarf galaxies so eager to have the big guy subsume them. More tiny galaxies are strewn along the cluster axis up to the smaller elliptical NGC 499 at the top. You can see a very blue smudge about half way between that is either a star-burst irregular galaxy or the merger in-progress of a couple of spirals. One truly bizarre structure is what appears to be a small chain of of faint galaxies with a bright galaxy at each end just to the upper left of NGC507. I though it was a hot pixel chain, but its in both of the images I stacked! One additional observation, NGC507 is also number 229 on Halton Arps catalog of peculiar galaxies because of its three (at least) concentric shells, which you can see here.

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Status	Advanced success
Started	...
Astrometry.net job	2242637
PixInsight job	OPN0IA1E1RFVI6L9DJ4SNXK56DO0DKK8
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h23m34s.225
RA (top/left)	01h24m19s.475
RA (top/right)	01h22m09s.806
RA (bottom/right)	01h22m49s.100
RA (bottom/left)	01h24m58s.556

Dec (center)	+33°22′44″.86
Dec (top/left)	+33°38′27″.80
Dec (top/right)	+33°27′44″.78
Dec (bottom/right)	+33°07′06″.62
Dec (bottom/left)	+33°17′42″.19

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