Hickson 100

[dcrowson]

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/ ... 2/sizes/l/



Dan