RE: Updated elements of USA 193 and Heavens-Above pass predictions

From: Ciprian Sufitchi (ciprian@sufitchi.com)
Date: Fri Feb 01 2008 - 16:42:46 UTC

  • Next message: Larry Van Horn: "Re: Updated elements of USA 193 and Heavens-Above pass predictions"

    Hi all,
    
    Apparently space-track.org does not distribute any keplerian data for
    satellite 29651 (USA 193). I wonder if tracking this object on a public web
    site is something appropriate.
    I noticed that http://www.space-track.org currently reports an Internal
    Server Error.
    
    Thanks,
    Chip N2YO.com
    
    -----Original Message-----
    From: djlaszlo@aol.com [mailto:djlaszlo@aol.com] 
    Sent: Friday, February 01, 2008 11:27 AM
    To: seesat-l@satobs.org
    Subject: Re: Updated elements of USA 193 and Heavens-Above pass predictions
    
    
    Note for  new observers:
    
    Chris Peat has kindly added a link for USA 193 on his user-friendly
    satellite prediction website.  An example page for Estes Park CO is here.  A
    link on this page allows you to enter your own home location.
    
    http://www.heavens-above.com/main.aspx?lat=40.377&lng=-105.521&loc=Estes+Par
    k&alt=2316&tz=MST
    
    The special page link:
    
    http://www.heavens-above.com/usa193.aspx?lat=40.377&lng=-105.521&loc=Estes+P
    ark&alt=2316&tz=MST
    
    An example  link which generates a prediction table:
    
    
    http://www.heavens-above.com/PassSummary.aspx?satid=29651&lat=40.377&lng=-10
    5.521&loc=Estes+Park&alt=2316&tz=MST
    
    Clicking on the table will generate the track of the satellite in the sky.
    Before these pages were posted, it was possible to make a prediction with
    the "Select a satellite from the database"  function and put in the number,
    29651, in the first box.  If the Heavens-Above times are bit off from Ted
    Molczan's, the path in the sky should be pretty close.
    
    Cheers, Dan Laszlo, Fort Collins CO
    
    
    
    -----Original Message-----
    From: Ted Molczan <ssl2molcz@rogers.com>
    To: seesat-l@satobs.org
    Sent: Fri, 1 Feb 2008 6:12 am
    Subject: Updated elements of USA 193
    
    
    
    David Brierley has reported new observations:
    
    http://satobs.org/seesat/Feb-2008/0006.html
    
    The data format of David's report is defined here:
    
    http://www.satobs.org/position/UKformat.html
    
    The object was about 0.3 s late relative the elements I posted yesterday.
    Here are updated elements:
    
    USA 193          5.0  2.5  0.0  4.3 v                    267 X 275 km
    1 29651U 06057A   08032.26673860  .00108121  00000-0  19426-3 0    03
    2 29651  58.4892 115.4602 0006491  79.8395 280.3436 16.01043930    04
    Arc 2008 Jan 30.29 - Feb 01.29, WRMS residuals = 0.029 deg
    
    Definition of 2-line elements format:
    
    http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/
    SSOP
    _Help/tle_def.html
    
    Using Satevo v0.51 with a 10.7 cm solar flux of 71, results in a decay
    prediction for 2008 March 29, in line with earlier estimates. The
    uncertainty is at least one week.
    
    I have updated the standard visual magnitude calculation:
    
    http://satobs.org/seesat_ref/06057A/06057A_stdmag_6.jpg
    
    Results are unchanged: mag 4.3 +/- 2, at range 1000 km, phase angle 90 deg.
    Co-efficient of phase = 1.26 mag/rad (0.0220 mag/deg).
    
    Ted Molczan
    
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