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Cardinal Point orientation guide?


michaelmorris

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I'm putting together a talk on measuring double stars and I'm struggling to find a simple idiot-proof guide to how to workout which direction is north when you already know the direction of west (This depends on the optical arrangement of the scope/diagonal you are using).  Any suggestions gratefully received.

Thanks

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Thanks

I'm more looking for something along the lines of 

                                   N

SCT + Diagonal =    W         E

                                   S

                                           S

Newtonian + Diagonal = W           E

                                           N

PS - I realise one or both these may be wrong, it's just for illustrative purposes.

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