Jupiter, drawn by Ken Clarke, as viewed through a 10″ F4.3 Reflector, 308x. w1=291.4deg, w2=231.6deg, seeing 3-4/5, at 20:20 UTC on March 25th, 1991 – Left Image: Ganymede at 21:05 UT (7 minutes into Transit)

Jupiter, drawn by Ken Clarke, as viewed through a 10″ F4.3 Reflector, 308x. w1=291.4deg, w2=231.6deg, seeing 3-4/5, at 20:20 UTC on March 25th, 1991 - Left Image: Ganymede at 21:05 UT (7 minutes into Transit)

Jupiter, drawn by Ken Clarke, as viewed through a 10″ F4.3 Reflector, 308x. w1=291.4deg, w2=231.6deg, seeing 3-4/5, at 20:20 UTC on March 25th, 1991
– Left Image: Ganymede at 21:05 UT (7 minutes into Transit)

Jupiter, drawn by Ken Clarke, as viewed through a 10″ F4.3 Reflector, 308x. w1=291.4deg, w2=231.6deg, seeing 3-4/5, at 20:20 UTC on March 25th, 1991
– Left Image: Ganymede at 21:05 UT (7 minutes into Transit)