[Barrykgerdes]

I have not thought about polar alignment drift before because I have not noticed it. My wedge mounted LX200 standing on a pier bolted to a reinforced concrete 2.4 metre square slab just sitting on the local ground was aligned once in the four years I had it. It was parked after every use and restarted by going to a star.

The initial alignment took quite some time and I had to get my LX200 orthogonally true first. I was then able to align the wedge by rotating the OTA at the 90 degree position until it rotated about the single point of the south celestial pole.

I regularly pointed it at -90 and always got the same view of the south celestial pole (naturally rotated due to time). The FOV was about 30 arcminutes so my readout precision would have been about 1 arc minute so I can safely say that my long term polar alignment was within an arc minute.

Below a view of the south pole from the DSS. This is what I see (on a dark night) j2000

Barry