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Old 14-09-2015, 04:00 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 17,907
Did you do the rough polar alignment first? It sounds like your PA is way off.

I would do a rough polar alignment first.

Then a 30 point t-point model and do the adjustments per the polar alignment report.

Then do a 100 point t-point model and do the accurate polar alignment. Then you will find the bright star only moves away from the cross hairs a small amount and you bring it back, centre it manually adjusting the mount and you should be very close now.

You could finish off with a 200 or 300 point model and then another accurate polar alignment and it should be another smallish adjustment and you will be really accurate.

If you activate tracking corrections in Protrack you may find it will improve star roundness in your autoguided images.

I think you are jumping too quickly ahead on the polar alignment process. Its best done with several iterations.Not one.

Greg.
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