Using a small geared stepper it can rotate as slowly as you need. I am controlling it using a CNC shield v4 with an Arduino nano. It uses one 6809 bearing.
And do not forget checking out this video in case you use the same board as I did: https://www.youtube.com/watch?v=1UKY1\_hOipQ
Licence: Creative Commons - Attribution Category: DIY
The author hasn't provided the model origin yet.