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Originally Posted by ausastronomer
Dave,
I saw your thread the other day, but haven't had time to reply in the required detail, it gets quite complicated and necessitates a lengthy reply to explain it all properly. I may not have the chance to do this for another couple of days but will do so when I have more time. In the interim, this book contains a lot of the answers if you have access to it at your local library or Astronomy Club Library. Its actually a book worth owning IMO, if you're interested in what makes all this stuff tick 
https://www.willbell.com/tm/tm6.htm
CS-John B |
Thanks for the link John.
Was wondering if you would respond.
Anything you mite add will be of great interest
Cheers.