Also known as The Witch's Broom. Old supernova remnant in Cygnus. I was surprised to get as much of the gorgeous teal-coloured O3 nebulosity from my light-polluted backyard, with no filters. Shot 45 90-second subs, 20 flats and library darks. Camera is a ZWO ASI183MC Pro. Telescope a Explore Scientific 127ED apochromatic.