G'day Paul,
The star sense has 40,000 objects and takes the place of the Nexstar controller.
If all you want it for is to do a polar alignment then it seems a bit expensive. You don't need to be able to see the south celestial pole to do a polar alignment. You can just guess as best as possible and then use the all star polar alignment. If your first guess is too far out you may get some drift while doing the alignment.
Regards,
Tony.
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