Re: Very bright, very slow

From: Björn Gimle @GlocalNet (@GlocalNet)
Date: Sun Mar 16 2008 - 11:30:33 UTC

  • Next message: Marco Langbroek: "USA 186 flare image"

    I definitely agree with Bev and Kevin about the additional track.
    Using ObsReduce and Express 3A elsets for 08066, I find 
    that the start of exposure appears to be 21:09:42 UTC +- 2s, 
    and the coordinates of the start of the faint track 
    07:42:01 -03:35:27 (2000.0)  +/- 0.005 deg 
    (ref.star sep.=10')
    Including ESA and classfd TLE I find one object remarkably
    close in declination, reaching this position 879 s later: 
    Unknown 051201  #90043 05835A 
    But I'm puzzled by ObsReduce's time error - from
    my SkyMap predictions I'd say the object is 18.5m early!
    
    90043 05 835A   9937 G 20080305210942000 28 25 0742010-033546 37 S
    (as always, IOD format: http://www.satobs.org/position/IODformat.html)
    9937= 8.600 W, 37.190 N
    
    This elset works best with SkyMap SGP4
    UNID 2008-03-05
    1 98565U 08565A   08043.73941061 0.00000000  00000-0  00000-0 0    06
    2 98565   2.0677  38.3472 0008523 188.8780 175.2400  1.00270000    09
    whereas this works best in ObsReduce (SGP4?)
    UNID 2008-03-05
    1 98565U 08565A   08043.73941061 0.00000000  00000-0  00000-0 0    06
    2 98565   2.0677  38.3472 0008523 188.8780 174.7700  1.00270000    09
    
    ----- Original Message ----- 
    ...
    The faint track is up and to the left of the 
    bright track in the first frame only.  It is more 
    or less the same length as the bright one.  Using 
    allsats from SpaceTrack there is nothing in that 
    area at the time when Express 3A matches the position of the bright streak.
    
    
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