Hickson 90

Posted by dcrowson
on Saturday, November 12, 2022
Hickson Compact Group 90 is a group of four galaxies in Pisces Austrinus:

NGC 7172 (HCG 90a, ESO 466-38, PGC 67874 and others) – 110.5 million light-years away.

NGC 7176 (HCG 90b, ESO 466-41, PGC 67883 and others) – 115 million light-years away.

NGC 7173 (HCG 90c, ESO 466-39, PGC 67878 and others) – 102 million light-years away.

NGC 7174 (HCG 90d, ESO 466-40, PGC 67881 and others).

See the annotated version for locations of these and numerous other galaxies.

Luminance – 18x600s – 180 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

300 minutes total exposure – 5 hours

Imaged on August 30th and September 25th, 2022 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

LRGB - https://www.flickr.com/photos/dcrowson/52495362219/sizes/l/
LRGB annotated - https://www.flickr.com/photos/dcrowson/52495076751/sizes/l/
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