NGC 4618 (Arp 23) and NGC 4625 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 3668 · IC 3675 · NGC 4618 · NGC 4625 · PGC 2174957 · PGC 2176077 · PGC 2177330 · PGC 2180781 · PGC 42575

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NGC 4618 (Arp 23) and NGC 4625

Acquisition type: Lucky imaging

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NGC 4618 (Arp 23) and NGC 4625

Acquisition type: Lucky imaging

An oddly symmetrical pair of galaxies. One (NGC4618) appears to be just a "larger" and rotated version and mirror image of the other (NGC4625)!

The smaller NGC 4618 is actually larger than it looks here. If you look carefully you can see sections of the faint outer bluish spiral structure beyond the brighter inner portion of the galaxy. It just barely rises above the light pollution in my suburb. Someday I will take another stab at this galaxy pair from a dark sky site where the faint outer arms should pop into view fairly easily.

A couple of the brighter O-B association/HII regions in NGC4618 actually were so bright that they were given the separate index catalog designations IC3668 and IC3669.

The pair is 37 (NGC4618) and 41 (NGC2625) million light years away. The little galaxy between the two stars of the the image is which is a small spiral, LEDA/PGC 2177330, which is far behind at 360 million light years.

Each of the seven 8 minute exposures that went into this image were actually SharpCap created live-stacks of 240 two second exposures.

Arp's Peculiar Galaxies

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Status	Advanced success
Started	...
Astrometry.net job	3469839
PixInsight job	FMHL3136IGM9CFKVJVQCRJCYJAPS380H
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h41m37s.560
RA (top/left)	12h41m23s.999
RA (top/right)	12h40m13s.740
RA (bottom/right)	12h41m50s.998
RA (bottom/left)	12h43m01s.757

Dec (center)	+41°10′55″.72
Dec (top/left)	+41°28′56″.63
Dec (top/right)	+41°01′53″.35
Dec (bottom/right)	+40°52′55″.62
Dec (bottom/left)	+41°19′54″.70

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NGC 4618 (Arp 23) and NGC 4625

NGC 4618 (Arp 23) and NGC 4625

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NGC 4618 (Arp 23) and NGC 4625

NGC 4618 (Arp 23) and NGC 4625

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