• NGC 6809, Messier 55 in Sagittarius
    • NGC 6809 in Sagittarius, M55
    M55
  • NGC 6809, M55, is one of the easiest globular clusters to resolve.
  • Hover over the picture for an annotated version
  • Date:  3 July 2022
  • FOV:  approximately 60' × 40'; the angular size of M55 is about 19'
  • Telescope:  Stellarvue SVX102T + SFFX-1 (737.5mm, 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
  • Pixel size:  4.78 μm
  • Resolution:  1.337 arcsec/pixel
  • 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:  Pixinsight – SPCC, DBE, BlurXT, NoiseXT, GHS, HST, Mask,
  • PMath GHS + Mask + HST, Sat, Bkg, DynCrop/Scale
  • Location:  Cherry Springs State Park near Coudersport, PA