Wow – a fantastic 28 minutes of observing.

After days of cloud, the cloud thinned allowing the half-moon and Jupiter to become visible, along with the brighter stars. Transparency was poor but it was pretty pleasant, around 10degC with only a gentle breeze.

Not expecting much and with Jupiter dancing on the laptop screen my flabber was aghasted to see an Io transit was underway. Io, the inner most of Jupiter’s Galilean moon system, is just visible on the Southern Equatorial Belt as it casts its shadow onto the Jovian cloud tops. At the same time Callisto, the outermost Galilean moon, was visible transiting behind Jupiter.

28 minutes later, the cloud returned and I shut down the observatory ready to process my images into the derotated image below.