askar c1 c2

Mystery to me

c1: Ha and OIII
c2: SII and OIII

Separated and registered the best I could from two stacks
- stack1: c1 extract Ha as R from RGB
- stack2: c2 extract SII as R from RGB

then

- take BG from each stack, combine and stack to produce OIII

---> RGB as e.g. SHO

attempt 1

Recombine as SHO in Siril and remove the stars to stretch the gas and dust. Finalise in StarTools; can't beat its superb deconvolution

   

supernova remnant ngc6888 crescent in cygnus
34c1 + 30c2 SHO    5 min frames @ hcg100

attempt 2

Simply take all the frames from stacks 1 and 2 and combine them. Then process in StarTools

64 frames combined RGB

More of the same, c1 only:

supernova remnant ngc6888 crescent in cygnus
veTEC571 on gso203    80x4min @ hcg100

starnet separation

Yet more, moon and skyglow only:

emission nebula sh2-101 tulip in cygnus
veTEC571 on q150p    30x4min @ hcg100

no starnet separation