Io's Shadow Transit of Jupiter this evening

 

Io is one of the four Galilean moons of Jupiter that obits closer than the others.

As a result, when the Sun causes Io's shadow to fall on Jupiter it creates a moving black dot on the surface of the cloud belts of Jupiter.

This image is inverted (left to right) and Io itself is too dim to capture simultaneously in this image.

I noticed the black dot shadow while imaging but didn't know it belonged to Io until I checked after the fact!

Taken with an Orion Apex 127mm Maksutov-Cassegrain telescope, 2X Barlow lens and a ZWO ASI585MC Pro camera. Post-processed with ZWO software and Irfanview.