• Messier 57 in Lyra, the Ring Nebula
    • M57 in Lyra, Ring Nebula
    Annotated image
  • NGC 5720, M57 or the Ring Nebula, is a planetary nebula in Lyra.
  • The spiral galaxy IC 1296 is visible at about 8 o'clock.
  • Hover over the image for an annotated view.
  • Date:  14 October 2022
  • FOV:  cropped to 20' × 13'; the angular size of M57 is about 1.4'
  • Telescope:  Orion 180mm Mak-Cass (2509mm, f/14, nominally 2700mm, f/15)
  • 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 gain 240
  • Pixel size:  4.78 μm
  • Resolution:  0.393 arcsec/pixel
  • Filter:  none
  • Stacking:  Twenty-four 240 second frames using Deep Sky Stacker
  • Total Time:  1 hour 36 minutes
  • Processing:  Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT,
  • MStr, GHS, HST, PMath MStr + GHS + HST, HDR4 + HDR5,
  • Sat, Scale, StarXT → Starless, Bill Blanshan star reduction
  • Location:  Darling Hill Observatory near Vesper, NY