Arp 319, Stephan's Quintet, and NGC 7331 in Pegasus
Arp 319 is a part of Stephan's Quintet, a group of galaxies in
Pegasus that are interacting gravitationally. Arp 319 is the
tight pair NGC 7318a and NGC 7318b. NGC 7317, NGC 7319,
and NGC 7320c are all gravitationally linked but the blue
galaxy NGC 7320 is an optical member of the grouping.
NGC 7331 is the larger spiral galaxy in the top right.
Date: 29 September 2022, 18 and 27 October 2022
FOV: cropped to 68' × 45'; the long axis of Stephan's Quintet is about 5'
Telescope: Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: iOptron CEM40
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
Filter: Baader Light Pollution Moonglow filter with IR cut
Stacking: One-hundred-forty-nine 240 second frames using Deep Sky Stacker
Total Time: 9 hours 56 minutes
Processing: GIMP – Levels, Curves, Saturation, Color Balance, Brightness-Contrast,
and Dim Stars using Value Propagate.
Location: Darling Hill Observatory near Vesper, NY