• NGC 6809, Messier 55 in Sagittarius
  • NGC 6809 in Sagittarius, M55
  • NGC 6809, M55, is one of the easiest globular clusters to resolve.
  • Date:  3 July 2022
  • FOV:  approximately 68' × 45'; the angular size of M55 is about 19'
  • Telescope:  Stellarvue SVX102T + SFFX-1 (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:  Twenty-one 240 second frames using Deep Sky Stacker
  • Total Time:  1 hour and 24 minutes
  • Processing:  GIMP
  • Location:  Cherry Springs State Park near Coudersport, PA