Arp 231 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Cetus (Cet)

Arp 231

This object, also known as IC 1575, is a galaxy located 220 million light years away in the constellation of Cetus at a declination of -4 degrees. This galaxy spans 1.7 arc-minutes in our apparent view, which corresponds to a diameter of 110,000 light years.

The galaxy looks like a large ellipitical galaxy which has absorbed a spiral galaxy with dust bands. It was classified by Arp into the category of Concentric Ring Galaxies. Notice the star stream, in the form of a short horizontal arc, which is seen some distance below the object and which extends faintly to the right.

For being such an interesting object, there is very little written about it and few images exist outside of a black and white Hubble image. This is the first image of this object on Astrobin.

Several other interesting galaxies are seen in the image background, highlighted by the largest one (MCG-01-03-005) to the lower left. This galaxy is 280 million light years away and is 140,000 light years in diameter. It has a fascinating off-center ring structure.

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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	3234679
PixInsight job	SVPL1B3OP0OS1X2U8OZN9MBCEDLMKQ6Y
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h43m33s.213
RA (top/left)	00h44m29s.103
RA (top/right)	00h42m52s.917
RA (bottom/right)	00h42m37s.475
RA (bottom/left)	00h44m13s.597

Dec (center)	-04°07′08″.23
Dec (top/left)	-03°59′54″.57
Dec (top/right)	-03°55′06″.65
Dec (bottom/right)	-04°14′20″.66
Dec (bottom/left)	-04°19′09″.28

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Arp 231

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