Arp 123 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Lepus (Lep) · Contains: NGC 1888 · NGC 1889

Arp 123

This image captures a pair of obscure objects located in the constellation of Lepus at a declination of -12 degrees.

Arp 123 is the interesting object to the right, consisting of the larger spiral galaxy NGC 1888 and the elliptical galaxy NGC 1889. This pair was part of Arp's group labelled "Ellipticals close to and perturbing spirals". Both galaxies are about 120 million light years away. The disk of NGC 1888 appears a bit distorted, with an asymmetric core and a slightly wavy disk. This galaxy is almost 3 arc-minutes long, with a diameter of 100,000 light years. The inner disk is bright but the outer disk looks almost transparent.

It looks to me like NGC 1889 is the more distant galaxy. I believe that there is more separation between these galaxies than it appears from our perspective, simply because of the lack of disturbance in NGC 1889.

The galaxy at left is the edge-on spiral MCG-2-14-15. This galaxy is located further away at 170 million light years and is about 90,000 light years in diameter. Looking closely, there appears to be several dark dust lanes cutting through the disk, including one on each side of the core.

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Description: Comparison to Original Arp Image

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Cloudy Nights
Arp's Peculiar Galaxies
ZWO ASI1600MM/QHY163M
Texas Astronomy
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Arp Catalog (Complete)
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Edge-on Galaxies
Edge-on Galaxy Dust Band
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Warped Disk Galaxy Shape

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Status	Advanced success
Started	...
Astrometry.net job	3345802
PixInsight job	DUJDZJ19YP5VTZO01XKPGKTPNLI5OEK2
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h22m49s.965
RA (top/left)	05h23m30s.140
RA (top/right)	05h22m09s.100
RA (bottom/right)	05h22m09s.754
RA (bottom/left)	05h23m30s.925

Dec (center)	-11°28′18″.42
Dec (top/left)	-11°21′16″.49
Dec (top/right)	-11°21′33″.68
Dec (bottom/right)	-11°35′20″.21
Dec (bottom/left)	-11°35′03″.82

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