Jupiter, Callisto transit

Jupiter is 365 million miles away and is so big that 1300 Earth's could fit inside.
The black dot showing on Jupiters surface is the shadow cast by Callisto just to the right of the shadow,
one of its 62 moons. Callisto has a diameter 1.4 times bigger than our moon.
To the left of Jupiter is the moon Io which is almost the same size as our moon.
Our Moon orbits the Earth every 27 days, however, Io orbits Jupiter in just 1.8 days
so I could see it travel across Jupiter in just 3 hours.

The image was made from 1201 frames taken using my ZWOASI120MC camera
and my Meade Etx 105 Maksutov Cassergrain telescope.
Captured using Sharpcap and stacked with Registax. The mount was a Skywatcher Heq5 pro.