RE: Possible observation of 31702,2007-027B

From: Ted Molczan (sslmolcz@rogers.com)
Date: Thu Jul 19 2007 - 01:42:17 EDT

  • Next message: Russell Eberst: "2007JUL17-18.OBS"

    Bram Dorreman has recovered the Centaur stage of the recent NOSS launch:
    
    http://satobs.org/seesat/Jul-2007/0160.html
    
    > 31702 07 027B   4160 P 20070719023235960 37 15 2342029+014649 99 S
    > 
    > Assuming it was this object.
    
    It was 311 s late, and within 0.30 deg of the track predicted by the following
    elset (after taking into account Earth's rotation), which I first posted on June
    20:
    
    1 70000U          07166.77466843  .00000023  00000-0  20000-4 0    06
    2 70000  63.9209  45.0824 0286563 148.8656 212.9725 13.68680000    09
    
    I fit that elset to a couple of positions that I extracted from the photos of
    the Centaur's propellant dump, taken by Babak A. Tafreshi:
    
    31702 07 027B   9981 G 20070615173140000 17 25 1044583+052875 58 S
    31702 07 027B   9981 G 20070615173210000 17 25 1109227-012000 37 S
    
    Adding Bram's point, results in the following similar solution, which I believe
    is fairly accurate:
    
    NOSS 3-4 r       0.0  0.0  0.0  5.0 v
    1 70000U          07200.09580003  .00000023  00000-0  20000-4 0    05
    2 70000  63.9673 317.6366 0286546 143.3187 218.7854 13.68536780    05
    
    I have a pass in a couple of hours, but the sky is overcast.
    
    Ted Molczan
    
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