It was a very foggy evening in the Netherlands, but Jupiter just peeked through the mist. The tiny black dot of Io's shadow was immediately visible. The moon itself became visible when it moved more to the limb of the planet (due to the edge darkening of Jupiter).
I made a small, quick sketch of the view through my 16" Dobson at 225x. I later enhanced the contrast and colorised it a bit with Photoshop, to match the actual view thhough the eyepiece as much as possible.
(It is one of my first sketches of Jupiter, so I sketched it a bit too small. Next time I'll try to sketch a bigger planet, maybe 4".)