Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sat May 23 2009 - 17:15:11 UTC

  • Next message: Gordon Prichard: "Re: Iridium 90&91"

    Derek Breit, David Brierley, Scott Campbell, Russell Eberst, Marco Langbroek,
    Mike McCants, Pierre Neirinck, Alberto Rango, Greg Roberts, Peter Wakelin, Mike
    Waterman, Brad Young, and I, contributed observations used to determine one or
    more of the following element sets.
    
    SLDCOM 2                                              2596 X 11649 km
    1 21775U 91076A   09143.06540583  .00000000  00000-0  00000-0 0    06
    2 21775  63.3556 257.0478 3353100 266.9603  54.9561  5.53393389    00
    Arc 20090311.19-0523.09 WRMS resid 0.006 totl 0.005 xtrk
    
    SDS 2-4                                                684 X 39676 km
    1 23945U 96038A   09142.91286585  .00000000  00000-0  00000-0 0    02
    2 23945  63.8389 223.3758 7340803 252.2537  21.4465  2.00574578    03
    Arc 20090519.98-0523.03 WRMS resid 0.005 totl 0.003 xtrk
    
    SDS 3-1                                                638 X 39721 km
    1 25148U 98005A   09142.63644506  .00000000  00000-0  00000-0 0    05
    2 25148  64.5509 123.3129 7358084 249.2386  22.8958  2.00581461    02
    Arc 20090511.91-0522.99 WRMS resid 0.006 totl 0.003 xtrk
    
    DSP F19                                                619 X 34725 km
    1 25669U 99017A   09142.72326360 -.00000061  00000-0 -91079-3 0    00
    2 25669  29.0849  54.6385 7090623 288.4119  11.0312  2.32823287    08
    Arc 20090427.94-0523.01 WRMS resid 0.005 totl 0.005 xtrk
    
    USA 198                                               1185 X 39165 km
    1 32378U 07060A   09142.98697555  .00000000  00000-0  00000-0 0    09
    2 32378  62.6266 235.1944 7151584 271.2959  15.3077  2.00631410    07
    Arc 20090429.07-0523.07 WRMS resid 0.018 totl 0.016 xtrk
    
    USA 202                                              35734 X 35864 km
    1 33490U 09001A   09142.14406218  .00000000  00000-0  00000-0 0    04
    2 33490   2.8643 340.4492 0015431  69.5441 290.3064  1.00232399    06
    Arc 20090519.86-0523.04 WRMS resid 0.004 totl 0.003 xtrk
    
    On May 22 UTC, USA 202 passed 48.48 E, still drifting west at 0.149 deg/d.
    
    STSS-ATRR r                                              162 X 810 km
    1 34904U 09023B   09143.00620032  .00344790  00000-0  20682-3 0    05
    2 34904 112.5312 265.9615 0472149 290.5671  64.5444 15.26066220    05
    Arc 20090521.18-0523.02 WRMS resid 0.024 totl 0.010 xtrk
    
    There is a significant time inconsistency between Russell's observations last
    night, and the two points I extracted from Kevin's video made a few hours later.
    I see no reason to distrust either data set. Russell's data could be 0.5 s late,
    or Kevin's could be 0.7 s early, or both may be correct and the orbit has
    changed in a way that only further observations will make clear. 
    
    Russell's data is consistent over the two consecutive passes he observed. Other
    observations he made last night appear to be accurately timed. Kevin made a
    video of another object (09023A) on May 19 UTC, from which I extracted the
    following point that is in close agreement with other observations.
    
    34903 09 023A   1775 G 20090519031800718 36 25 1927649+285486 37 S+078 10
    
    For now, I offer the above elements, based on the arc ending with Russell's
    data, with the caveat that the object could be a few seconds early tonight,
    assuming that it was 0.7 s early, several hours later when Kevin made his video.
    
    
    99750A                                                2610 X 37605 km
    1 90004U 99750A   09142.98361700  .00000000  00000-0  00000-0 0    06
    2 90004  64.4902 223.4129 6606420 268.2120  21.1060  2.01406043    08
    Arc 20090414.26-0523.06 WRMS resid 0.007 totl 0.005 xtrk
    
    04539A                                                2445 X 37908 km
    1 90020U 04539A   09142.77613856  .00000000  00000-0  00000-0 0    04
    2 90020  64.3999 160.2885 6677534 249.4350  30.7847  2.00618880    00
    Arc 20090418.95-0522.94 WRMS resid 0.011 totl 0.005 xtrk
    
    05864A                                                2355 X 38002 km
    1 90046U 05864A   09142.78026053  .00000000  00000-0  00000-0 0    02
    2 90046  63.4477 135.4074 6711385 270.5826  19.1410  2.00596332    03
    Arc 20090511.96-0522.9 WRMS resid 0.004 totl 0.003 xtrk
    
    06667A                                                 212 X 28904 km
    1 90061U 06667A   09142.76817198  .00006907  00000-0  54059-3 0    05
    2 90061  27.5042 102.4472 6852347 316.0858   6.4671  2.86667404    01
    Arc 20090418.97-0522.95 WRMS resid 0.004 totl 0.002 xtrk
    
    08628A                                                2441 X 37922 km
    1 90081U 08628A   09142.95304272  .00000000  00000-0  00000-0 0    03
    2 90081  62.6876 175.4613 6679604 277.0608  16.9796  2.00564901    05
    Arc 20090419.1-0523.02 WRMS resid 0.005 totl 0.004 xtrk
    
    08731A                                                2479 X 37877 km
    1 90082U 08731A   09142.57065422  .00000000  00000-0  00000-0 0    08
    2 90082  64.2042  61.8537 6664752 258.5916  25.2324  2.00602073    09
    Arc 20090511.93-0522.93 WRMS resid 0.006 totl 0.005 xtrk
    
    Ted Molczan
    
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    This archive was generated by hypermail 2b29 : Sat May 23 2009 - 17:17:49 UTC