[Galah (Patrick)]

This concerns circumpolar stars.

Is anyone aware of a calculation or software which can find the point (azimuth) where a circumpolar star "changes" direction from left-to-right (or right-to-left).
That is, the point where a tracking telescope changes from moving to the left, to moving to the right (or from moving to the right to moving to the left).

This can be found using (say) Starry Night and the step forward/backward in time function, but is a pain.

Regards,

Patrick.