Objects 28500 and 28546

From: Mike McCants (mmccants@io.com)
Date: Mon Jan 29 2007 - 13:42:35 EST

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    Spacecom stopped releasing tles for objects 28500 and 28546
    some months ago.  These objects are 2004-050A and B.  They are
    a "Delta 4 demonstration test flight" payload and rocket.
    
    I was able to spot the payload near perigee under clear and dark
    conditions on December 16/17 from a dark site north of Austin.
    Apparently I saw it with both my 8 inch and 13 inch telescopes and
    failed to record an estimated magnitude.  It was probably around
    magnitude 11 or 11.5.  It was near perigee at 11500 miles with a
    range of about 12500 miles.
    
    Last night I was able to spot the rocket near perigee at a range
    of 13000 miles.  It was quite bright under a bright moon from BCRC.
    I estimated that it was varying from about magnitude 10 to 11 with
    a period of about 90 seconds.
    
    I have placed the following tles in the classified file:
    
    Delta4 Demo      4.0  2.0  0.0  5.5 v    8
    1 28500U 04050A   06350.44919876 0.00000000  00000-0  00000-0 0    09
    2 28500  11.9254 202.0056 2890516 240.9759   0.0000  1.41310373    04
    Delta4 Demo r    6.0  2.0  0.0  4.0 v   12
    1 28546U 04050B   07028.57971064 0.00000000  00000-0  00000-0 0    03
    2 28546  12.2910 202.7945 2680736 239.2158 120.7992  1.37842000    08
    
    These orbits are quite stable, so the objects should be within
    a minute or two after a month or two.
    
    Mike McCants
    
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