Lacrosse 5 elements

From: Ted Molczan (seesat@rogers.com)
Date: Fri Feb 17 2006 - 21:07:27 EST

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    Lacrosse 5 continues to exhibit a negative rate of decay. 
    
    I have some doubt about the magnitude of the decay of the elsets below, due to
    their short observational arcs. Extending the arc of the epoch 06047.74369365
    elset back to Jan 15 reduced the magnitude of the decay by half, but the
    analysis implied that observations by two skilled observers on a total of three
    passes during Jan 29-31, were more than 0.5 s late, which seems unlikely.
    
    It will be interesting to follow the further evolution of this orbit.
    
    Lacrosse 5      15.0  4.0  0.0  2.5 v
    1 28646U 05016A   06047.74369365 -.00000108  00000-0 -25753-4 0    08
    2 28646  57.0140 117.5418 0004049  10.4037 349.7060 14.53342813    07
    Arc 2006 Jan 29.25 - Feb 16.80, WRMS residuals = 0.020 deg
    
    1 28646U 05016A   06046.23041922 -.00000112  00000-0 -26821-4 0    09
    2 28646  57.0140 123.2020 0004007   9.1612 350.9474 14.53343044    08
    Arc 2006 Jan 29.25 - Feb 14.81, WRMS residuals = 0.015 deg
    
    Brief Introduction To TLEs And Satellite IDs: http://www.satobs.org/element.html
    
    Ted Molczan
    
    
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