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Old 03-07-2013, 10:33 AM
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Lee
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Location: Newcastle, Australia
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Any thoughts on my polar alignment?

I recently regreased the G-11 after my CCD needed a repair, so had to redo my PA... I used PHD drift to do so, with azimuth, left altitude untouched, as didn't adjust during the mount service.

I tried a pair of plate solves to assess Dec drift...

slewed to RA 20hr, Dec 0 deg (about as low to the horizon as I can get at dec 0, damn house....)

plate solved as 20h 00m 03s, 00 deg 07' 31"

then slewed in RA only, and plate solved again
after slew solved as 18h 25m 22s, 00 deg 08' 43"

So thats a Dec drift of 1' 12" across 95 minutes....

Seems ok to me, can anyone suggest how far off my PA is from this data?
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Old 03-07-2013, 05:28 PM
Tony_ (Tony)
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Join Date: Oct 2011
Location: Melbourne, Australia
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Hello Lee,

I came across an article that says that tells you how to calculate the error:

http://celestialwonders.com/articles...nmentError.pdf

Maybe it well help?

Regards,
Tony.
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