USA 129 search elements

From: Ted Molczan (molczan@rogers.com)
Date: Sat Jan 18 2003 - 13:27:36 EST

  • Next message: Will Marchant: "CHIPSat observations?"

    Tony Beresford has reported the object running more than 3 minutes late on 2003 Jan 18 UTC:
    
    http://satobs.org/seesat/Jan-2003/0208.html
    
    Search elset 70001 corresponds to a manoeuvre at the first perigee following the latest pre-manoeuvre observation, made by Tony on
    2003 Jan 17 UTC:
    
    1 70001U          03017.58526620  .00039674  00000-0  45000-3 0    07
    2 70001  97.8511  82.8968 0506500 139.8303   0.0000 14.80547000    04
    
    The residuals were fairly high, so I evaluated later perigee passages, and found that elsets 70005 and 70006 minimized the
    residuals:
    
    1 70005U          03017.85473380  .00039443  00000-0  45000-3 0    09
    2 70005  97.8511  83.1634 0512800 138.9452   0.0000 14.79096151    01
    
    1 70006U          03017.92210069  .00039304  00000-0  45000-3 0    07
    2 70006  97.8511  83.2300 0515100 138.7239   0.0000 14.78540440    04
    
    Elset 70008 is for a still later perigee passage, but the residuals are higher than for elsets 70005 and 70006:
    
    1 70008U          03018.05683449  .00039027  00000-0  45000-3 0    02
    2 70008  97.8511  83.3633 0521800 138.2813   0.0000 14.76979849    00
    
    I believe that the object will be found in either orbit 70005 or 70006, but it would not hurt to bracket searches between 70001 and
    70008.
    
    Ted Molczan
    
    
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