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I think your big problem here is still S/N ratio.
23 data shots @ 6 secs apiece (to limit star trailing). 5 darks, 1 flat.
I dont think you are getting enough signal to overcome the inherrent noise.
When I do 8 sec shots I can't pull a clean picture out. I have to go to at least 30sec subs to get a decent S/N ratio to pull a clean picture.
What sort of mount/scope are you using to only limit you to 6 secs.
I take it you are only tracking and not guiding.
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