Quote:
Originally Posted by codemonkey
Yeah, it wouldn't surprise me if there was some tilt in there as well.
I plate solved the image and the rotation is in RA... if it was polar alignment, wouldn't it be in DEC?
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I think that if you have a PA error, the image will rotate about the guidestar - both axes are involved. In OAG systems it will look like the image is rotating about a point outside of the field of view, but with ONAG or a guidescope, the center of rotation can be in the fofv.