Paul,
I have just processed two earlier sequences - one at 9.28pm which was only 10 minutes short of the first sequence i processed and the other at 8.46pm. the 9.28 sequence only shows one star - and that is "just" shows it. Same settings. I think it really came down to the 2.5 second long exposure that gave the stars - and that was at the maximum coverage, so 10min really did make a difference. if only you had gone that tad longer?
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