I made a digital animation in GIMP of a partial eclipse of Europa by Ganymede (27%). During the event I saw clearly a “division” between the two moons but it was impossible to tell which moon was before the other. Because I couldn’t detect any color difference between the two moons I guess the “division” was an optical illusion due to the 8-figure. Hope you like it!
Jef De Wit
Object Name: Europa and Ganymede
Object Type: moon (of Jupiter)
Location: Hove, Belgium (51°09’ N 4°28’ E)
Date and time: 17 March 2015 0.14-0.30 UT
Equipment: Orion Optics UK 30 cm Dobson
Eyepiece: 5mm Nagler T6 (magnification 240x) + orange filter