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Thank Brent,
Yes Phillip, what you noticed with the "stretched" stars (eggy stars or elongated stars as other call them) is that they tend to form a rotation pattern. This is particularly noticeable towards the bottom left of the image as Brent has picked up.
Field rotation is usually caused by poor polar alignment and poor guiding (as a result of poor polar alignment).
Lesson for me is to slow down and do a proper drift alignment before guiding...
Bo
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