Geostationary Solar Eclipse on Tuesday

From: Gerhard HOLTKAMP (
Date: Mon Jan 03 2011 - 09:38:00 UTC

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    Clear skies permitting European observers can see two solar eclipses tomorrow 
    (4-JAN-2011). There will of course be the partially eclipsed sun rising in 
    the morning sky but in the evening it should also be possible to see some 
    geostationary satellites experiencing deep solar eclipses.
    The best satellite seems to be NSS 806 (#25239, 1998-014A). It experiences an 
    almost total eclipse at 17:25:45 UT. Expect a change in magnitude by about 3 
    mag during the five minutes around that time. Begin and end of the eclipse is 
    about half an hour before (after) maximum and the total change in magnitude 
    should be around mag 5.  
    At the same time TDRS 10 (#27566, 2002-055A) will experience an eclipse but 
    its change in magnitue will be less (mag 1.5 in the final 5 min). 
    INTELSAT 806 (#24846, 1997-031A)  has a maximum eclipse at 17:34:30 UT and 
    should show a change in brightness by about mag 2 in the final 5 min. 
    Good Luck.
    Gerhard HOLTKAMP
    Darmstadt, Germany
    Seesat-l mailing list

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