This nebula has many names: Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula. I will stick with the Omega Nebula. It's right around the Eagle Nebula. It is considered one of the brightest and most massive star-forming regions of our galaxy. I really look forward to imaging this in narrow band!
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Taken with my ASI 183MC Pro, GSO 6" f/4 Newtonian, and GEM28 mount