Tumbling IRIDIUM 914 - Flashes

From: satrack\@libero\.it
Date: Sat Aug 15 2009 - 23:06:21 UTC

  • Next message: Marco Langbroek: "SATOBS ML (4353), 15-16 Aug 2009: USA 129, 161, 186 & IGS 1B"

    If someone observes tumbling Iridiums, I think these days 
    flashes from the IRIDIUM 914 can be predicted by using my
    program with this model:
    
    ORIENTATION TYPE #2: Rotating
    
    Rotation Axis: 
    
    DEC [deg]: 7.4
    RA [deg]: 268 
    
    Surfaces:
    
    (Antenna 1) 
    RA [deg]: -74.8
    DEC [deg]: -23.4
    
    (Antenna 2)
    RA [deg]: -71.1
    DEC [deg]: -21.1
    
    (Antenna 3)
    RA [deg]: -85.3
    DEC [deg]: -34.2
    
    The model has been obtained by using the following 
    list of observed flashes (brighter than Mag 0):
    
    (UTC)
    
    M#03 - 11/08/2009 20h07'30"
    M#01 - 15/08/2009 19h23'12"
    M#02 - 15/08/2009 19h23'44"
    M#04 - 15/08/2009 21h08'53"
    M#05 - 15/08/2009 19h23'37"
    M#06 - 15/08/2009 19h21'52"
    M#07 - 15/08/2009 19h22'46"
    M#08 - 15/08/2009 19h24'10"
    M#09 - 15/08/2009 19h23'18"
    M#10 - 11/08/2009 20h07'57"
    M#11 - 15/08/2009 19h25'29"
    M#12 - 11/08/2009 20h07'23"
    M#13 - 12/08/2009 19h31'26"
    M#14 - 12/08/2009 19h31'55"
    M#15 - 12/08/2009 19h32'27"
    M#16 - 12/08/2009 19h32'56"
    M#17 - 15/08/2009 19h25'06"
    
    The rotation period is of about 26 s.
    
    A screenshot with the flashes generated by the Antenna 1 can
    be found here:
    
    http://digilander.libero.it/SATrack/Iridium914_H15.jpg
    
    Best Regards,
    Simone
    
    http://digilander.libero.it/SATrack/
    
    
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