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Polar alignment with your phone/tablet


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Hi there,

I experimented today with the Polar alignment using Google star map and GPS. I had my phone act as a compass and polar alignment scope in the EQ5. It worked a treat and managed to lock on Polaris, which is usually behind the house if I'm observing from the back garden. Having fixed the alignment I used the motor to track a star for 30 minutes (again using phone star map). I have to say, the result was pretty good.

Basically align the mount roughly, then use Google maps to search for Polaris, then adjust the alignment accordingly until the star is the middle.

Attached are a bunch of photos of the process...

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Edited by emadmoussa
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Not trying to be a killjoy but surely the mount has some residual magnetism or motor windings... I know that when I use a compass anywhere near mine it goes mad :maybe my mount is just very active!

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Not trying to be a killjoy but surely the mount has some residual magnetism or motor windings... I know that when I use a compass anywhere near mine it goes mad :maybe my mount is just very active!

Understandable - normal compass tends to go crazy when very near the motor. But the GPS enabled one doesn't seem to have a problem.

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Understandable - normal compass tends to go crazy when very near the motor. But the GPS enabled one doesn't seem to have a problem.

GPS only provides location but if this is coupled with a mems gyroscope that should be unaffected by magnetic fields.

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