USA 129 observation; manoeuvre alert continues

From: Ted Molczan (molczan@home.com)
Date: Tue May 08 2001 - 07:36:39 PDT

  • Next message: Daniel Deak: "Re: USA 129 observation; manoeuvre alert continues"

    USA 129 had not manoeuvred as of my observation on 2001 May 08 at about 02:00
    UTC.
    
    The sky condition was bad, but I did manage to time USA 129's appulse of 40
    Her:
    
    24680 96 072A   2701 B 20010508020033660 17 25 1641670+313200 68 S
    
    Site 2701: 43.68764 N, 79.39243 W, 230 m
    
    The object was running about 0.9 s late relative Mike McCants' latest elements:
    
    USA 129         15.0  3.0  0.0  5.1 v
    1 24680U 96072A   01126.86200273  .00031500  00000-0  41488-3 0    02
    2 24680  97.8242 189.7216 0478500   5.4746 354.5253 14.83643097    00
    
    My appulse timing is accurate, but the co-ordinates are rough. I plotted the
    appulse path in Uranometria 2000, as predicted by the above elements, and read
    the approximate appulse co-ordinates directly.
    
    I believe that the major re-boost manoeuvre is likely to occur late today (May
    08 UTC) or sometime the following day. Both USA 129 and its sister, USA 116
    (95066A / 23728) would manoeuvre within hours of one another.
    
    It is raining here now, and I doubt that the sky will clear for my 96072A pass
    on 2001 May 09 at 02:16 UTC. I am a bit more optimistic for my two USA 116
    passes several hours later.
    
    Ted Molczan
    
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