RE: Updated NanoSail-D elements; rapid flashing observed

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Mon May 23 2011 - 16:38:17 UTC

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    Russell has reported two more observations; the object continues to flash with a period of ~1 s:
    
    1006211242011052223073984  02   11220920  +465405 120 4             +67+79  1 F
    1006211242011052223090681  02   11203617  +235641 120 4             +64+77  1 F
    
    Observation format: http://satobs.org/position/UKformat.html
    
    NanoSail-D                                               568 X 597 km
    1 37361U 10062L   11142.94249932  .00025079  00000-0  23313-2 0    00
    2 37361  71.9649  91.5303 0021031 237.3364 122.5778 14.94123199    09
    Arc 20110519.01-0522.96 WRMS resid 0.062 totl 0.045 xtrk
    
    The eccentricity is somewhat in doubt; when I allow all elements to vary, the solutions tend toward more than double the
    above value, but the arc is short, with few points, so for now I have locked down the inclination and propagated
    argument of perigee. 
    
    The analysis is complicated by the object's extreme sensitivity to variations in atmospheric density, which can limit
    the duration of an arc to several days.
    
    Ted Molczan
    
    
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