Arp 61 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: PGC 1093563 · PGC 1097703 · PGC 1099220 · PGC 15632 · PGC 15637 · PGC 15655 · PGC 213288

Arp 61

This object, also known as UGC 3104, is a galaxy with its companion located 330 million light years away in the constellation of Eridanus at a declination of -2 degrees. This galaxy spans 1.3 arc-minutes in our apparent view, which corresponds to a diameter of 130,000 light years. A large blue foreground Milky Way star is superimposed over the Arp object and creates a bit of a distraction.

This galaxy was classified by Dr. Arp into the category of Spiral Galaxies with Small, High Surface Brightness Companions on Arms. If the small galaxy was a companion in close proximity, one would expect to see more disturbance in the main galaxy disk in that region. But I can’t really see much disturbance in the main galaxy near the companion, except that the galaxy disk is slightly brighter towards that side. So it seems to me that the small galaxy is distant and not a companion.

Redshift data shows that the other galaxies in the image are about the same distance away as Arp 61, but again I don’t see much disturbance occurring. The largest of these is the huge elliptical galaxy UGC 3105, seen on the left, which has a diameter of about 250,000 light years.

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Status	Advanced success
Started	...
Astrometry.net job	4168391
PixInsight job	W035T7QGARIRRQERO6Q4MT09RR0DQ4R6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	04h36m47s.753
RA (top/left)	04h37m27s.795
RA (top/right)	04h36m06s.908
RA (bottom/right)	04h36m07s.706
RA (bottom/left)	04h37m28s.600

Dec (center)	-02°17′13″.38
Dec (top/left)	-02°10′12″.33
Dec (top/right)	-02°10′30″.39
Dec (bottom/right)	-02°24′14″.20
Dec (bottom/left)	-02°23′56″.37

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Arp 61

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