The sky was mostly clear to partly cloudy and I was fortunate to get a window between 9 and 10 p.m. EST to capture the double shadow transit. Ganymede's shadow is the larger of the two on the bottom left (moving toward bottom center) and Europa's is on the lower right, approaching the limb. The moons themselves were as follows: Io to the upper left, Europa lower right, and Ganymede bottom right (farthest out). The GRS was also visible making it a pretty spectacular apparition!

Orion 180mm Mak-Cass, ASI 224mc, Firecapture

Registax 6, Photoshop