The Dumbbell Nebula (also Messier 27 and NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1360 light-years. It is very bright at magnitude 7.5. The inner core is 8 arcminutes diameter while the much fainter outer core double the diameter of the object.

M27 in SHO only, excerpt.
M27 in narrow band only. The outer part is very well resolved.

The object was very well placed, reaching zenith at the witching hour. I recorded about 16 hours of SHO.

I was inspired by this apod image and the author gives a very complete & inspiring processing tutorial here.

For processing, I went “free style” to discover the dataset but will revisit with a more systematic approach at some point. The bright stars have green halos due to my suboptimal OIII filter (but do I really need to spend 1G on an Astrodon filter to solve this?). Also during processing it became evident I need to complete this dataset with a starfield; it took a couple weeks, but this goal has now been achieved and the RGB field is now available below. The RGB data, initially intended as a starfield only, can be processed as a color image in its own right (see below), at least for the inner core. Anyways, here it is, still a work in progress for processing. Also note for once I tried a composition effort, with the bright star to the left and the Dumbbell nebula off-center to the right.

M27 is still very well placed and I am toying with the idea of adding an OIII bonus dataset.

M27 from the color field.
Excerpt of the RGB field.