RE: 4542 SATOBS 96 072A.

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sun Mar 14 2010 - 10:13:50 UTC

  • Next message: Russell Eberst: "2010MAR13.OBS"

    Alberto, you observed 09061B / 36089, not 96072A / 24680. The latter made a
    small manoeuvre on Mar 11, which lowered its orbit. Those of us who updated
    the orbit interpreted this as a large increase in drag, which did not fully
    reflect the magnitude of the change of orbit. As a result, on your second
    pass last night, it was about 21 s early. You had no way to know this, so
    you could easily have missed it.
    
    Here are approximate elements, based on Russell Eberst's observations of Mar
    11 UTC and Derek Breit's first observation of Mar 13 UTC:
    
    1 24680U 96072A   10073.14255387  .00014645  00000-0  22019-3 0    00
    2 24680  97.7843 126.4863 0452489 273.7090  81.2510 14.86444060    04
    
    Derek obtained video on his second pass, which should yield additional
    points. I will update the elements ASAP after he posts those observations.
    
    Ted Molczan
    
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