Superb Mike!
I had captured this same sequence with my mewlon, but not to same quality. I couldn't work out where the hell Ganymede came from, as it wasn't there, then in was, yet was approaching the planet... so Ganymede was so far from the equator it was only masked by the polar end of Jupiter's shadow... now it makes sense.
I've attached my sequence from this same night for comparison.... now I look closely you can see clearly Ganymede appearing as a little blib and then expanding, even some detail there.
cheers,