R: Updated elements; USA 186 search TLE

From: alberto rango (alberto.rango@tin.it)
Date: Sat Jul 21 2012 - 21:45:37 UTC

  • Next message: Tony Beresford: "satobs july 21 @ 8597"

    Further to Ted Molczan USA 186 search TLE,
    here are elements of my observations made on 20th July in ROME (site 4542)
    and on 21st July in BARI
    (site 4641):
    
    28888 05 042A   4542 F 20120720195243480 17 24 2343750+460813 38
    
    28888 05 042A   4641 F 20120721201801600 17 24 1005480+641187 38
    
    4542  41.9683N  012.4545E  80 mt.
    4641  41.1067N 016.9008E  35 mt.  
    
    
    
    > Oggetto: Updated elements; USA 186 search TLE
    
    > 1. USA 186 re-boosted
    
    > Alberto Rango's observations of 2012 Jul 19 UTC revealed USA 186 running
    late and considerably off-> > track - indicative of
    > a re-boost coordinated with that of USA 224.
    
    > This was its last observed pre-manoeuvre orbit:
    
                                                            251 X 1006 km
    > 1 28888U 05042A   12198.82821034  .00029922  00000-0  24691-3 0    06
    > 2 28888  97.8982 260.7918 0538552  95.7725 270.5119 14.79258237    08
    
    > I was unable to identify a manoeuvre perigee that accounted for both the
    time and track of Alberto's > observation. It
    > appears that the manoeuvre may have been a perigee-raising, at the apogee
    passage of 2012 Jul 19 at > 17:13:47 UTC. If so,
    > then it should be in approximately the following orbit, which closely fits
    Alberto's observations:
    
                                                            261 X 1006 km
    > 1 70000U          12201.87211139  .00024871  00000-0  24691-3 0    05
    > 2 70000  97.8982 263.8130 0531088  85.8560 280.3142 14.77688529    09
    
    > Allow at least one minute prediction time uncertainty, for every 15 revs
    after epoch.
    
    > Ted Molczan
    
    
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