Hickson 100

Posted by dcrowson
on Sunday, February 5, 2023
Hickson Compact Group 100 consists of the four of the five or six galaxies above and to the right of the center of the image:

NGC 7823 (HCG 100a, PGC 100, MCG+02-01-011 and others) is the largest member of the group. This one is located approximately 253 million light-years away.

MCG+02-01-012 (HGC 100b, Mrk 934, PGC 108 and others) is the member to the left (east) of NGC 7823. This one is located approximately 248 million light-years away.

MCG+02-01-009 (HGC 100c, PGC 89 and others) is the spiral at the top right of the group. This one is located approximately 258 million light-years away.

MCG+02-01-010 (HGC 100d, PGC 93 and others) is the somewhat edge-on galaxy below HGC 100c. This one is located approximately 264 million light-years away.

These are located about three degrees from the bright star Algenib in Pegasus.

NGC 7810 (UGC 12919) is the galaxy at the bottom left. I managed to capture asteroid 896 Sphinx near it.

Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 9:8:8x300s – 45:40:40 minutes each – binned 2x2

365 minutes total exposure – 6 hours 5 minutes

Imaged October 20th and 21st, 2022 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.

LRGB - https://www.flickr.com/photos/dcrowson/52670667802/sizes/l/
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