M27 The Dumbbell Nebula in HOO narrowband. First time I've imaged this in NB so had no idea what to expect. I like it.
From Wiki "The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1227 light-years. This object was the first planetary nebula to be discovered by Charles Messier in 1764... Given its semi-minor axis radius of 1.01 ly, this implies that the kinematic age of the nebula is some 9,800 years."
GSO 10" F4 Newtonian, ZWO ASI 183mm Pro at -10C, SVbony 7nm Ha and OIII filters, Ha 155 minutes, OIII 209 minutes, Bin2, HEQ5 Pro.
Full field at Astrobin --->
https://astrob.in/cn8b4m/0/