Sky Simulator for ASCOM and Alpaca is a software program designed to simulate an astronomical camera mounted on a computer-controlled telescope. The camera displays images of the night sky based on the telescope pointing-at position and is affected by exposure time and focuser position. The images can be created artificially or using the online deep sky survey.
It simulates also a guide camera. mount, focuser and camera rotator if required. You can also use your own mount in the simulation...