Arp 198 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Leo (Leo)

Arp 198

This Astrobin Debut Object is a pair of magnitude 15 galaxies located in the constellation of Leo at a declination of +18 degrees.

In his Arp catalog, Dr. Arp classified this object into the category of Galaxies with Material Ejected from Nuclei. Dr. Arp believed that this was one galaxy. His notes indicate a “spike pointing to a small nucleus”. In my image it is obvious that these are 2 galaxies, with the left side of the edge-on galaxy hiding behind the face-on galaxy. This is a great example of the value of color for the interpretation of these small distant objects.

The right edge-on spiral is UGC 6073a, located 420 million light years away. This galaxy spans 1 arc-minute in our apparent view, which corresponds to a Milky Way like diameter of 120,000 light years.

The left face-on spiral is UGC 6073b. The image shows it to be closer to us than UGC 6073a, but I could not find reliable distance information for this galaxy. Both galaxies appear undisturbed, so I don’t believe that they are interacting.

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Description: Comparison to Original Arp Image

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	4491616
PixInsight job	0HNVI0YBNU5B9MEZZIGXR66U5MIGVZNM
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h59m46s.591
RA (top/left)	11h00m14s.371
RA (top/right)	10h59m18s.685
RA (bottom/right)	10h59m18s.835
RA (bottom/left)	11h00m14s.461

Dec (center)	+17°39′12″.30
Dec (top/left)	+17°43′49″.38
Dec (top/right)	+17°43′46″.98
Dec (bottom/right)	+17°34′34″.44
Dec (bottom/left)	+17°34′36″.83

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Arp 198

Arp 198

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Arp 198

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