According to the "Robert Ferguson Observatory," they state in their 2011 Observing highlights, that there will be a dual-shadow transit of Europa and Ganymede on December 27, 2011. Although I do recommend their observing highlights to those who would like to know, their event is incorrect. They have:
Although I do not wish to refute this prediction, after checking the Galilean moons simulator, they're prediction is wrong. Ganymede does transit and Io does eclipse, but Europa is just too far away from Ganymede for dual-shadow transit. Without making any advanced Judgments, this may occur, but maybe if viewed from a different angle on the earth.
- Tuesday, 12/27/2011 - Dbl Sh Tr Jup - Time: 18:00
- Double shadow transit of Jupiter:
Transit of Europa is already in progress at sunset.
06:00p Nautical twilight ends
06:05p Ganymede's shadow begins transit
06:32p Astro twilight ends
07:44p Io is occulted by Jupiter
07:51p Europa's shadow begins transit
07:52p Europa transit ends
07:55p Ganymede's shadow transit ends
10:15p Europa's shadow transit ends
11:07p Io reappears from eclipse
Although I do not wish to refute this prediction, after checking the Galilean moons simulator, they're prediction is wrong. Ganymede does transit and Io does eclipse, but Europa is just too far away from Ganymede for dual-shadow transit. Without making any advanced Judgments, this may occur, but maybe if viewed from a different angle on the earth.
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| Computer Simulation of Galilean moons provided by the Galilean Moons Simulator, Text Inserted by AstronomicalEventsCalendar |
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