This should be easy.
Touch is touching Wheel
------------------> Ship set angle to angle(Wheel.X, Wheel.Y, Touch.X, Touch.Y)
You can add lerp for smoother rotation:
Ship set angle to anglelerp(self.angle, angle(Wheel.X, Wheel.Y, Touch.X, Touch.Y), dt*8
By the way, the best Asteroids game I've seen is Pew Pew. It's so cool!
https://play.google.com/store/apps/deta ... wpew&hl=it