UGC813, UGC816 and PGC1048 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: PGC 1048 · PGC 2288140 · PGC 4598 · PGC 4600

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UGC813, UGC816 and PGC1048

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Powered byPixInsight

UGC813, UGC816 and PGC1048

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Here another group of galaxies in Andromeda from the UGC galaxy catalog. A nice interacting pair of galaxies and a third in the same group, along with 4 or 5 small bluish irregulars and even tinier dwarf spheroidal galaxies that I am guessing are satellites of these three bi galaxies. There is also a faint background galaxy cluster in the upper center area of the image and another one in the upper right quadrant of the image.

The three bright galaxies are all at the same distance of around 250 to 260 million light years. From top to bottom they are:

PGC 1048, 15.0m, 50x20 arc seconds, type Sab spiral about 60,000 light years across

UGC 813, 14.9m, 75x35 arc seconds, type Sc(?) spiral about 85,000 light years across

UGC 816, 14.5m, 95x40 arc seconds, type SABc spiral about 100,000 light years across

Note the little colorful ring of red and blue dots around the nucleus of UGC 816 which I think mark the location of some intense star formation in O-B associations and HII regions. UGC813 has a doubled nucleus, but I am wondering whether this is just a dwarf elliptical passing in front of it as it orbits through the galaxy group.

Another object of interest is quasar SDSS J011616.31+463635.7, z=1.00795 (8.4 bly away) which is the pale blue "star" near the center right edge of the field. Numerous nice double stars too with contrasting colors. A pretty star field. The brightest star at the center of the field is 10th magnitude HD 7538.

This is a stack of three 10 minute live-stacks in SharpCap each composed of 300 two second subs.

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Status	Advanced success
Started	...
Astrometry.net job	2937771
PixInsight job	A7C4MLCD38IG9ZIJYALX82C1CIZZH7S1
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h16m16s.890
RA (top/left)	01h15m40s.943
RA (top/right)	01h15m31s.750
RA (bottom/right)	01h16m51s.240
RA (bottom/left)	01h17m01s.416

Dec (center)	+46°44′45″.18
Dec (top/left)	+46°56′09″.54
Dec (top/right)	+46°34′25″.44
Dec (bottom/right)	+46°33′19″.29
Dec (bottom/left)	+46°55′03″.11

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UGC813, UGC816 and PGC1048

UGC813, UGC816 and PGC1048

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UGC813, UGC816 and PGC1048

UGC813, UGC816 and PGC1048

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