This is M16, but there was a problem. For some reason the stars are fan-shaped. I have shrunken the image so that it is not noticeable. I believe a light pollution filter that was not tightly bolted down inside the image train slipped loose and tipped slightly, causing the fan shapes. The M57 image below was taken an hour later with the same setup only tipped straight up toward the zenith. This is only 9x6' worth of data.
Anyway, this stunning nebula is my favorite. I hope to revisit it soon with a tied-down filter!
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