• Arp 319, Stephan's Quintet, and NGC 7331 in Pegasus
    • NGC 7331 and Stephan's Quintet
  • 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