Jupiter on a cloudy evening

Spotted Jupiter tonight. It was quite cloudy, so hard to keep track of. Could just about make out Ganymede and a very small glimpse of Europa. Think I need to figure out how to set up the scope so I can track, only using the Right Assertion control. Again, this was from the flat through double glazing. It is amazing how you can not even touch the telescope or else the vibrations will shake the image so violently that you can barely make out what you are looking at.