Jupiter and Io (28 Aug 2019)

We finally had a clear sky last night (the 28th) and I was finally able to get some imagery of Jupiter before it passed behind the western treeline. Jupiter crosses the meridian well before the end of twilight now, leaving me less than an hour before the planet passes behind the trees.

Io, being the closest moon to Jupiter, circles the planet every 42.5 hours. This speed is evident by the misalignment of the separate red, green and blue exposures taken only 65 seconds apart. For the planet image, I aligned the exposures to Jupiter.
 

This detail shot has the frames aligned to the moon with the vastly overexposed limb of Jupiter on the right. Io is the most volcanic object in the solar system with the surface continually being resurfaced by eruptions. The moon’s surface is covered by sulfur deposits and I think that yellowish tinge is what is seen in the small image.