For accurate polar alignment (for astrophotography exposures longer than a few minutes per frame) there are a lot of methods, one is the time consuming drift method. Another should be the
Kochab Clock method which makes use of the fact that the celestial north pole situated 45' from the true north pole is in line with the line Polaris-Kochab (beta UMi) the second brightest star in UMi. However this method has limitations:
* northern hemisphere only
* can be aligned when Kochab is exactly above, below, left or right of the North Pole any event occurs only once in 6 hours.
I think that a variation on this is using *any* star not too far (< 20º) from the pole (can be south as well) as long as that star has the same altitude (or azimuth) of the true north / south point. This only requires the user to horizontally OR vertically move the RA axis of the mount. Of course the mount should be level. Such a star can be found in a live planetarium app.
Any indeas on this ?