Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Tue Apr 28 2009 - 16:53:05 UTC

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    Derek Breit, David Brierley, Russell Eberst, Greg Roberts, Peter Wakelin and
    Brad Young contributed observations used to determine one or more of the
    following element sets.
    
    USA 89 r                                                338 X 6729 km
    1 22519U 92086C   09117.96481705  .00001852  00000-0  23373-3 0    02
    2 22519  56.9015  96.1584 3223898  13.9341 353.2499  8.79718551    02
    Arc 20090418.08-04271 WRMS resid 0.015 deg
    
    DSP F19                                                623 X 34721 km
    1 25669U 99017A   09117.81630455  .00000085  00000-0  13000-2 0    06
    2 25669  29.0562  63.2487 7089097 274.6657  14.7897  2.32822675    04
    Arc 20090422.91-0428.01 WRMS resid 0.005 deg
    
    USA 200                                               1010 X 39344 km
    1 32706U 08010A   09117.46027988  .00000000  00000-0  00000-0 0    02
    2 32706  63.8213 348.9325 7217867 270.2335  15.1396  2.00608643    01
    Arc 20090425.86-0427.91 WRMS resid 0.007 deg
    
    USA 202                                              35729 X 35889 km
    1 33490U 09001A   09117.22032098  .00000000  00000-0  00000-0 0    06
    2 33490   2.8778 339.4878 0019028  92.0137 267.7917  1.00195485    09
    Arc 20090421.75-0427.99 WRMS resid 0.006 deg
    
    On Apr 27 UTC USA 202 passed through 44.6 E, drifting west 0.281 deg/d. If its
    destination is near 44 E, then I estimate that the manoeuvre to synchronize its
    mean motion with Earth's rotation would occur around Apr 28-30, near perigee,
    which is within a few minutes of 11:18 UTC.
    
    05683A                                                 306 X 31622 km
    1 90040U 05683A   09116.52970490  .00000646  00000-0  38668-3 0    01
    2 90040  27.9195 323.4297 7008375  26.6075 356.7158  2.60030081    09
    Arc 20090420.91-0426.8 WRMS resid 0.003 deg
    
    The Baker-Nunn cameras at Olifantsfontein, South Africa (site 9002) and Woomera,
    Australia (site 9003), Moonwatch sites 129 (Dallas), 401 (Bloemfontein, South
    Africa), 601 (Adelaide, Australia), 805 (Santiago (Romero), Chile), and the
    non-Moonwatch site 3701 at San Juan, Argentina, contributed observations used to
    determine the following element set.
    
    SCORE                                                   179 X 1400 km
    1 00010U 58006A   58356.93087292  .01594321  00000-0  20390-2 0    01
    2 00010  32.3020 206.7126 0851316 166.7055 195.7591 14.31714351    08
    Arc 19581219.69-1222.98 WRMS resid 0.087 deg
    
    This is a preliminary result from my project to produce 2-line elements from
    accurate observations of early spacecraft. The cross-track residuals are 0.013
    deg, and the orbit is in good agreement with non 2-line elements published at
    the time. I am testing some new methods on 58006A, before resuming work (some
    time this year) on Sputnik 1 rocket body.
    
    Project SCORE, launched in Dec 1958 was the first use of the Atlas rocket for an
    orbital mission, and it was the only time that most of the Atlas actually went
    into orbit. The object was huge and heavy for the time: about 25 m long, 3 m in
    diameter, and 3,960 kg, comparable to the rocket bodies of the Soviet Sputniks
    1, 2 and 3, which had entered orbit previously, and made a huge impression on
    the world. Finally, the U.S. could claim rough parity.
    
    The actual payload was the first satellite communications relay experiment,
    which included repeated playback of a Christmas greeting recorded by President
    Eisenhower.
    
    http://en.wikipedia.org/wiki/Project_SCORE
    
    What remains of Baker-Nunn site 9003 (Woomera), centred on the camera's WGS-84
    coordinates:
    
    http://maps.google.com/?ie=UTF8&t=k&om=1&ll=-31.100583333,136.784305556&spn=0.002839,0.003616
    
    Ted Molczan
    
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