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Old 03-03-2025, 10:15 PM
Startrek (Martin)
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Startrek is offline
 
Join Date: Dec 2017
Location: Sydney and South Coast NSW
Posts: 6,666
Finding True South - Solar Noon Shadow

I’ve posted this once or twice over the years ( not sure if it’s a sticky )
Here’s a proven way of finding True South using the Sun’s shadow. It’s been around for centuries…….
It’s particularly handy if you don’t have a permanent set up and you have to plonk your tripod or base ( EQ or AZ ) down in the yard or at a remote site each observing or imaging session.
As long as you have this True South line and the latitude in degrees and mins of your location, then you will end up fairly close to the SCP which is a good starting point for any polar alignment method. I’ve actually “fluked it” a couple of times over the years after setting up the EQ tripod and rig and ended up within 20 to 30 arc mins of the pole ( according to my PA software )

See attached

Martin
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File Type: pdf Finding True Celestial North South Line.pdf (300.2 KB, 49 views)
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