Arp 249

Posted by dcrowson
on Saturday, January 2, 2021
Arp 249 (UGC 12891, PGC 25, vv 186/a/b and others) is the grouping of galaxies just below and to the left of the center of the image. It looks like there could be two or three but they have one or two designations depending on the catalog. Arp has these in his ‘Appearance of Fission’ class. Located in Pegasus, I could not find any distance estimates.

The some-what edge-on galaxy above center is PGC 4. It appears to be much closer at approximately 165 million light-years away.

This whole field appears to have a bunch of IFN. I could not see this in other images but this kind of stuff can be errantly processed out. See the inverted luminance for a better look.

Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

360 minutes total exposure – 6 hours

Imaged December 15th and 16th, 2020 and January 1st, 2021 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.


Luminance inverted -

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