UGC10502 & UGC10497 Small, but lovely Galaxy pair (lowenthalm)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: PGC 214521 · PGC 2749039 · PGC 58604 · PGC 58634 · TYC4423-481-1 · TYC4423-87-1

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UGC10502 & UGC10497 Small, but lovely Galaxy pair

Acquisition type: Lucky imaging

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UGC10502 & UGC10497 Small, but lovely Galaxy pair

Acquisition type: Lucky imaging

I frequently take EAA images of UGC catalogue galaxies that are close to other targets I am imaging to look for interesting subjects for future deeper imaging. I took a look at this pair of galaxies and captured an image of it in June last year. Being struck by its beauty, I decided to collect more data over the next couple of months to produce a deeper image of it.

I did a test stack and then collected more image data, but never finished adding and processing the additional data until now!

The pair is at nearly exactly the same redshift of around z=0.0144, which them roughly 200 million light years away, but probably within less than 2 million light years of each other.

Both are spirals, but the beautiful UGC 10502 at the center of the image is about double the size of the smaller UGC 10497. UGC 10502 looks considerably bigger because it is face on, while UGC 10497 is closed to edge on, sporting two clear spiral arms with very bright knots of large and O-B bright star clusters. Assuming the distance above, UGC 10502 being about 140 arc seconds across should be roughly 135,000 light years across, making it a bit bigger than our own galaxy. UGC 10497's size is more difficult to determine since its near edge on and only has two major arms (it might be a barred spiral) is very roughly 58,000 lights years across based on its size of 30 x 60 arc seconds.

UGC 10502 is certainly the prettier of the two with multiple branching arms that remind me a bit of M101, but being much more symmetrical. Based on how many knots the spiral arms contain, it's certainly making a lot stars right down to its exceptionally small nucleus.

The 14 images stacked here were taken with my 16" dob. Each was an eight minute image composed of 320 x 1.5 second exposures.

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Galaxies - small and unusual

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Status	Advanced success
Started	...
Astrometry.net job	5578438
PixInsight job	6DUMLE4NHPK15AXD83UX0ATTVRLYGD0C
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h37m37s.747
RA (top/left)	16h35m50s.478
RA (top/right)	16h38m56s.620
RA (bottom/right)	16h39m25s.677
RA (bottom/left)	16h36m17s.986

Dec (center)	+72°22′23″.74
Dec (top/left)	+72°19′05″.100
Dec (top/right)	+72°15′58″.80
Dec (bottom/right)	+72°25′37″.100
Dec (bottom/left)	+72°28′46″.71

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UGC10502 & UGC10497 Small, but lovely Galaxy pair

UGC10502 & UGC10497 Small, but lovely Galaxy pair

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UGC10502 & UGC10497 Small, but lovely Galaxy pair

UGC10502 & UGC10497 Small, but lovely Galaxy pair

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