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Thanks Patrick and Bill,
I set up in the same place in my yard on a paved area every time, so I have marked true south with a line and also the tripod leg positions
I have no south view below 60deg, no west view below 60deg, east view is ok above 30deg and north view ok above 30deg . So I have a limited selection of alignment stars with enough magnitude ( say > mag 2 ) to use.
I usually look at Stellarium an hour before I start the nights session and pick 2 stars for alignment and a list of 3 or 4 objects to image at mag 6 or lower
Tonight the sky in Sydney should be relatively clear , maybe some minor high level cloud so I will try Rigel Kent and Spica for my alignment stars ( at 8.00pm they are 55deg and 65deg Alt and 90deg apart in Az )
I read somewhere to keep clear of the SCP and Zenith areas as this could put your alignment out and also keep the 2 stars on the same side of the meridian
I have never tried just a 1 star alignment as I was told the minimum is 2 star and 3 star for good pointing accuracy
Welcome any advice or comments
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