Tag Archives: Ganymede


Jupiter & 3 Moons

Jupiter with 3 moons Europa, Io, & Ganymede, The GRS (Great Red Spot) was getting ready to go around the Limb, the 4th Moon Callisto was way off the field of view!

The Great Red Spot (GRS) is a persistent anticyclonic storm, 22° south of Jupiter’s equator. observations from Earth establish a minimum storm lifetime of 350 years.

The GRS winds speeds top out at about 400mph.. and is 2 to 3 times the size of the Earth!

I tested out the ZWO 224MC single shot color camera on my 8inch SCT to see what it can do, …Seeing was okay at prime focus, but any magnification you could see the Earth’s atmosphere boiling. so will try to Barlow it up on the next night of stable seeing.

Best Regards,

John Chumack