Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Tue Apr 07 2009 - 17:02:48 UTC

  • Next message: Robert Holdsworth: "Re: Decay of 33449"

    David Brierley, Russell Eberst, Greg Roberts, Viktor Voropaev and Peter Wakelin
    contributed observations used in the following updates.
    
    The line following each element set states the duration of the underlying
    observational period, or "arc", and the WRMS (weighted root mean square)
    residuals between the orbit and the observations; the smaller the value, the
    better.
    
    Description of 2-line elements: http://www.satobs.org/element.html
    
    Vortex 4                                             31294 X 40283 km
    1 14675U 84009A   09096.43786283  .00000000  00000-0  00000-0 0    02
    2 14675   7.6674 356.4688 1065822 287.7402  60.9073  1.00268784    00
    Arc 2009 Mar 28.75 - Apr 06.77, WRMS residuals = 0.003 deg
    
    Vortex 6                                             31771 X 39825 km
    1 19976U 89035A   09096.35880979  .00000000  00000-0  00000-0 0    03
    2 19976   5.8638  11.9619 0954802 221.3536 130.9867  1.00235833    00
    Arc 2009 Mar 13.83 - Apr 06.80, WRMS residuals = 0.004 deg
    
    Lacrosse 2                                               635 X 645 km
    1 21147U 91017A   09097.12006851  .00000050  00000-0  72132-5 0    09
    2 21147  67.9810 215.0773 0006973 235.5131 124.5343 14.76146835    05
    Arc 2009 Apr 05.10 - 07.13, WRMS residuals = 0.023 deg
    
    Lacrosse 2 decreased its altitude slightly, sometime between 2009 Mar 09 and Apr
    05 UTC, perhaps the result of momentum wheel unloading.
    
    SDS 3-2                                              35744 X 35833 km
    1 26635U 00080A   09096.61090689  .00000000  00000-0  00000-0 0    06
    2 26635   2.7930  44.7988 0010464 130.5762 229.6623  1.00269000    02
    Arc 2009 Apr 06.76 (several minutes)
    
    USA 171 r                                            35484 X 35768 km
    1 27938U 03041B   09095.83896356  .00000000  00000-0  00000-0 0    01
    2 27938   4.1510 161.2928 0033778 244.9199 114.9557  1.00850891    01
    Arc 2009 Mar 12.81 - Apr 06.78, WRMS residuals = 0.004 deg
    
    USA 202                                              35734 X 35835 km
    1 33490U 09001A   09096.26202579  .00000000  00000-0  00000-0 0    09
    2 33490   2.8938 338.8211 0011943  96.5189 263.3210  1.00281897    06
    Arc 2009 Mar 29.81 - Apr 06.81, WRMS residuals = 0.009 deg
    
    USA 202 r                                            35942 X 38082 km
    1 33491U 09001B   09096.41169220  .00000000  00000-0  00000-0 0    02
    2 33491   2.9068 335.5267 0246626  12.9425 347.6802  0.96056520    00
    Arc 2009 Apr 01.77 - 06.75, WRMS residuals = 0.002 deg
    
    96576A                                               31917 X 40032 km
    
    1 96076U 96576A   09096.48965012  .00000000  00000-0  00000-0 0    03
    2 96076   7.7055 351.4354 0958077  15.3942 347.2612  0.99608128    07
    Arc 2008 Oct 28.14 - Apr 06.77, WRMS residuals = 0.003 deg
    
    Ted Molczan
    
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