07/16/2026
The Deer Lick group in the constellation Pegasus, dominated by NGC 7331, a spiral galaxy about 40 million l-y away. The other galaxies that appear near it (labelled image i comments) are almost 10 times more distant, 290 - 365 million l-y. These galaxies are visually grouped from our vantage point, but are not gravitationally linked to each other any more than all matter is linked. The odd name of the group came about when an amateur astronomer had a particularly good look at the group from Deer Lick Gap, in South Carolina.
The light from the large NGC 7331 originated when creatures related to modern moths and butterflies first appeared on Earth. Photons from the most distant galaxy set out when the earliest vertebrate that might be capable of walking appeared, setting the stage for vertebrates to move from the sea to the land.
40 x 300-sec exposures (plus 20 darks, 30 flats & bias frames)
3 hr 20 min total exposure
Bortle 4 sky
ew Moon, 0% illuminated
ZWO ASI533mc Pro camera (gain 101, offset 70, -5°C)
Baader UV-IR Cut filter
Apertura CarbonStar 6 (1377 mm focal length) telescope
HEQ5 Pro mount (guided)
stacked and processed with Siril
Denoised nd background extracted with GraXpert
tweaked in Raw Therapee & GIMP