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Rotation
I'd be grateful if someone could help me understand what is happening here.
The image is an overlay of the first and last 2 subs in a run of 50x5 minute subs taken last night (I know - moon - but they were taken through Ha). Over a 4 hour period, it is apparent that there has been a rotation the focal point of which is not far below the bottom of the image.
As a matter of possible interest, when I asked my mount to slew to NGC3576, it took me to a position that would probably correspond pretty closely with that focal point of the rotation shown in the image. That may be pure coincidence but because I don't know, I mention it anyway. The mount is a PMX controlled by TheSkyX. I have yet to do a TPoint run so polar alignment is still a little off.
But that doesn't seem to me to explain this behaviour.
Watching these 50 images stack in DSS, I noticed that the offset on each frame went from 0,0 to 105,46 in steady steps - and the image shows it.
SO, any ideas?
Peter
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