• 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:  2 June 2025
  • FOV:  cropped to 10' × 6' 40"; M57 is about 1.4'
  • Telescope:  Celestron C14 SCT (3910mm, f/11`)
  • Starizona SCT Coma Corrector/Reducer (2668.5mm, f/7.5)
  • Guiding:  ZWO ASI120MM mini guide camera, ZWO2600 Duo
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  iOptron CEM120
  • Camera:  ZWO ASI2600MC Pro Cooled (0°C) Color CMOS with gain 100
  • Pixel size:  3.76 μm
  • Resolution:  0.291 arcsec/pixel
  • Filter:  Optolong UV/IR cut
  • Stacking:  twenty-three 300 second frames using PixInsight
  • Total Time:  1 hour 55 minutes
  • Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT → Linear
  • HTS, GHS, MStr, PixelMath MStr + GHS + HST → Stars,
  • Linear, StarXT, HTS, GHS, MStr,
  • PixelMath MStr + GHS + HST → Starless, HDRMST467PhLm
  • PixelMath ~(~Starless*~Stars) → Blend, Sat, DynCrop/Scale
  • Location:  Darling Hill Observatory in Vesper, NY