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Old 12-07-2021, 07:43 AM
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pmrid (Peter)
Ageing badly.

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Join Date: May 2008
Location: Cloudy, light-polluted Bribie Is.
Posts: 3,665
Stacking artifacts mystery

I grabbed some images last night and tried stacking them this morning only to discover that there are mysterious artifacts cropping up that I'd appreciate other greater minds than mine to ponder.
Here's a crop from 4 hours of 10minute subs of NHC346. The number of dots seem to equal the number of subs so there is clearly a drift of some kind but the image itself seems fine. What the devil is happening here?
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