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Old 14-04-2019, 06:00 AM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,174
Quote:
Originally Posted by gregbradley View Post

My experience is even high end mounts require PA to be spot on or eggy stars start to annoy you. PA needs to be checked as soon as star shapes start to go off.
I don't get this Greg?...if you have pretty close PA (perhaps not perfect) there will be a slow drift over time of the star but the off axis autoguiding adjusts for this, as well as for any periodic error in the system throughout a sub ...so, how do you get eggy stars?

My NJP had close but not perfect PA and produced round stars just as the AP now seems to do as well

Mike
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