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[Centaur]

Friday evening (Jan 16) Jupiter's Galilean satellites #1 Io and #2 Europa and their shadows will appear simultaneously in transit across Jupiter.

I've created two preview graphics and a detailed timetable that can be viewed at CurtRenz.com/jupiter.html

Photos and descriptions of the event would be welcome additions to this thread.

As an advance notice, there will be a rare triple shadow transit during the night of 2015 JAN 23-24. The next triple shadow transit after that won't happen until 2032. I'll provide graphics and a timetable for this month's triple shadow transit by midday on January 23.

[Paulie pchris00]

I just got to work, so I won't be able to observe the dual shadow transit, but observed Io's shadow almost in the center of Jupiter's disk, and may have even seen Io in Jovian transit. I observed a bright spot in the Jovian disk, about where I'd expect Io to be. I haven't often observed the Galilean Moons in transit except for when they are near the Jovian limb, so if indeed it was Io, that was a nice treat.

[Centaur]

Jan 16, 2015 22:15:33 GMT -6 Paulie pchris00 said:

I just got to work, so I won't be able to observe the dual shadow transit, but observed Io's shadow almost in the center of Jupiter's disk, and may have even seen Io in Jovian transit. I observed a bright spot in the Jovian disk, about where I'd expect Io to be. I haven't often observed the Galilean Moons in transit except for when they are near the Jovian limb, so if indeed it was Io, that was a nice treat.

Thanks your fine report, Paulie, of what you were at least able to see. Congratulations if that really was Io. I hope you will be able to observe the rare triple shadow transit during the night of January 23-24.