[Nico13 (Ken)]

Hi all,

Well finally been getting a few clearer nights and have been collecting more data on NGC253 to add to some earlier subs.
I had only about a half hr of subs originally and now had another hr to add to it, total subs 26 made up of 9 and 17 from the two lots.

Problem arises when the initial lot of 9 subs is not included in the stack for some reason.
These are all shot on my DSLR in raw and the only difference I can see is that the frame alignment is slightly different from the second set but not much and the seeing conditions were not as good for the first set.

Any ideas on why DSS would reject the first set,