M17 – The Omega Nebula

Or the Swan Nebula…or Checkmark Nebula…or┬áLobster Nebula…or Horseshoe Nebula. Whatever your favorite name for it, Messier 17 is a great summer target.

I shot the data for this last summer and recently processed it. This was before my CGEM OnStep and pier upgrades, so each night I had to drag my telescope out and set it up before imaging. This was almost 8 hours of data, spread across several nights.


  • Explore Scientific ED127
  • Celestron CGEM
  • SBIG STF-8300C with an Optolong L-eXtreme filter
  • Quieter 3C miniPC with NINA & PHD2
  • 92x 300s subframes
  • Processed in Siril, Photoshop, AstroSharp & NXT

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