Date Posted: 7/2/2024
Date Taken: 7/28/2014, 7/30/2014, 8/26/2014
Scope: Planewave CDK 12.5 f/8, 2541mm
Camera: SBIG STL-11000 with Astrodon Tru-Balance E-Series Gen2 filters
Temp: -15C
Mount: Losmandy Titan
Guiding: SSAG, Celestron 80mm guide scope, 600mm.
Exposure: LRGB 135:75:75:70 (L) 27x5m, binned 1x1. RGB each Nx5m, binned 2x2

Calibrated and Stacked with CCDStack2; RGB combine and DDP with MaximDL. Processed with CS4

NGC 7331 is an unbarred spiral galaxy about 40 million light years away in Pegasus. The smaller galaxies include NGC 7334, 7335, 7336, and 7340. It is not a true galaxy group; the smaller galaxies are much further away, at distances of 332, 365, 348, and 203 million light years. The entire group is known as the Deerlick Group; the smaller galaxies are referred to as the "fleas". Strangely, the central bulge of NGC 7331 rotates in the opposite direction as the spiral arms; the reasons for this are not fully understood.

This image represents additional processing done on the original 2014 image.