Dual Shadow Transit on Jupiter - Nov 13
For many observers in North America during the early evening of 2007 NOV 13, a number of events will be visible involving the inner three of the four great Galilean satellites of Jupiter.
Io (#1) and Ganymede (#3) will both transit Jupiter. For a while the satellites will be in transit simultaneously.
The shadows of Io and Ganymede will both transit Jupiter. For a while the shadows will be in transit simultaneously.
Europa (#2) will be occulted and eclipsed.
Callisto (#4) will be well to the west of Jupiter and uninvolved in any of the above phenomena, but for a while it will be the only Galilean satellite that is easily visible.
I’ve created two graphics that illustrate the events. The first is a view from far above the north side of Jupiter. The second shows the view from Earth. They can be seen at the webpage noted in my signature.
In the second graphic Jupiter is shown with north at the top. Europa is moving right to left, while the other three satellites and the two shadows are moving left to right. Telescopes invert or flip the image in accordance with their individual designs.
Photos and descriptions of the events would be welcome additions to this thread.
Below is my calculated timetable of the events. Under that is a glossary of terms in the timetable.
2007 NOV 13/14
20:43:18 UT -- #3 Partial Transit Begins
20:54:34 UT -- #3 Total Transit Begin
20:55:01 UT -- #2 Partial Occultation Begins
20:59:09 UT -- #2 Total Occultation Begins
21:08:41 UT -- #1 Partial Transit Begins
21:12:21 UT -- #1 Total Transit Begins
21:47:50 UT -- #1 Partial Shadow Transit Begins
21:51:29 UT -- #1 Total Shadow Transit Begins
22:12:59 UT -- #2 Partial Eclipse Begins (during Occultation)
22:17:07 UT -- #2 Total Eclipse Begins (during Occultation)
23:21:30 UT -- #1 Total Transit Ends
23:21:39 UT -- #3 Total Transit Ends
23:23:21 UT -- #3 Partial Shadow Transit Begins
23:25:10 UT -- #1 Partial Transit Ends
23:32:29 UT -- #2 Total Occultation Ends
23:32:55 UT -- #3 Partial Transit Ends
23:34:32 UT -- #3 Total Shadow Transit Begins
23:36:37 UT -- #2 Partial Occultation Ends
23:58:03 UT -- #1 Total Shadow Transit Ends
00:03:11 UT -- #1 Partial Shadow Transit Ends
00:49:59 UT -- #2 Total Eclipse Ends
00:54:07 UT -- #2 Partial Eclipse Ends
01:53:40 UT -- #3 Total Shadow Transit Ends
02:05:56 UT -- #3 Partial Shadow Transit Ends
GLOSSARY
#1: Io
#2: Europa
#3: Ganymede
#4: Callisto
Eclipse: Satellite in shadow of Jupiter
Occultation: Satellite hidden behind Jupiter
Shadow Transit: Shadow of satellite on disk of Jupiter
Transit: Satellite crossing disk of Jupiter
Partial: Disk of satellite or shadow partially into event
Total: Disk of satellite or shadow fully into event
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