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Thread: Dual Shadow Transit on Jupiter - Nov 13

  1. #1
    Join Date
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    Wink 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.

    Iíve 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
    For astronomical graphics and data visit
    www.CurtRenz.com/astronomical

  2. #2
    Join Date
    Dec 2006
    Posts
    13,423
    Centaur, you have quickly become quite valuable on this board

    Thanks for these informative stargazing posts.

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