Last nights Jupiter with Red Spot and Io

Thw shadow of Jupiter's Moon Io with its 400 active volcano's can be seen as a black dot transiting just above the great red spot.

 I was surprised at how quickly Io raced across Jupiter.
In the second image you can see that Io has moved slightly faster than the GRS.

Taken with Meade Etx 105pe and a £30 microsoft cinema lifecam webcam at 10 fps. Captured in sharpcap and processed with Pipp and Registax using the best 910 images from 1400 I think this is the best I can do with Jupiter with this setup.