Thank you everyone. The problem has been identified as being within
DSS. Apparently DSS has a comet tracking function, so I will stack all
24 frames again. The individual frames are all good, so I shouldn't
have any further problems. I was mislead by the beautiful straight
elongation I got with Lemmon as opposed to the raggedy effect I got this time.
Kevin, I'm not particularly into comet imaging, just thought I'd get a shot, as it is such a large bright one. My last comet image before Lemmon was Halley.
raymo
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