IC59 is the part of the nebula above gamma Cas, and has a blue reflection component, while IC63 is the brighter component to the left.This was composed of 24 x 10min H-alpha frames, and 10 x 5min of each of R, G and B.
This is a bicolour narrowband image of NGC281, the Pacman nebula, captured with 9 x 10min H-alpha frames and 12 x 10min OIII. The “white” parts in the middle of the nebula are where there is some OIII response in addition to H-alpha, and the yellow parts are where there is just H-alpha.
Some two weeks later, the moonless skies allowed be to take 10 x 5 min R, G and B frames to add into the narrowband filters:
Something different last night… Instead of going for the brightest non-stellar object in Hercules, I tried one of the faintest, inspired by the picture of it in this month’s Astronomy Now. This is planetary nebula Abell 39 – 25 x 10min frames with the Atik 460ex OSC. The small edge-on spiral galaxy visible at about 10 o’clock relative to the nebula is mag 16.6 PGC58246.
Edit: A couple of nights later I acquired 17 x 10min through an OIII filter, and combined them with the RGB image shown above. This made quite a difference, and made the nebula much more apparent!