Recently, I got interested in imaging Planetary nebulae. With my limited gear (4" refractor), only a handful of the typical PNs are easily imaged. There was a list of brightest PNs that was published here on CN a few years ago (see this thread from 2010). However, that list did not have many of the bigger (but fainter) PNs like Sh2-216 and HFG1.
I think the old DSO Browser (now Telescopius) has a function to sort out PNs, but last I checked, it was still missing the 2nd largest (but fainter) PN, Sh2-216. In my research, I found an interesting link that catalogs many of the PN emission spectra, but its nomenclature for the names is missing. Any idea what these “names” (like A-2, A-8, A-12) etc are equivalent to more conventional names (like Abell 6 Abell 21, CTB1, HFG1 etc)?
So, does anyone have an updated list that shows PNs by size and visual brightness? If there is a list that contains some ideas of surface brightness, that will be even better. Thanks ..... Anil