ETS 6 (94-056A) flash period

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Wed Feb 13 2002 - 05:56:01 EST

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    The flash period for ETS 6 (23230, 94-056A, Kiku 6) was 
    just under 8.5 seconds on Feb. 12.  Here's a PPAS report 
    of flashes during the second bright episode that evening:
    
    94- 56 A 02-02-12 04:55:51   EC  431.3 0.2  51  8.457 +1.5->inv
    
    Only some of those were as bright as +1.5, of course, at 
    about those times I mentioned in my earlier message.
    
    Weather permitting I will sure try to see it do the same
    again on Feb. 15, i.e., Thurs PM Feb 14 Texas time.  (It
    does five orbits in about 71 hours, 49 minutes, as its
    mean motion is about 1.6709.)
    
    Observing challenge for folks with scopes -- the three
    Sirius Radio satellites: they are in 24-hour 
    geosynchronous orbits, but with high inclination and 
    definitely non-zero eccentricity.  They are fairly large 
    3-axis-stabilized satellites with a pair of big solar 
    panels.  I would think they must flare sometimes.  Here 
    are elements lifted from Tony Beresford's glo10.txt file:
    
    SIRIUS-1
    1 26390U 00035A   02039.57319389  .00000034  00000-0  10000-3 0  2991
    2 26390  63.3282 279.1106 2681333 270.0672  59.7567  1.00274471  5912
    SIRIUS-2
    1 26483U 00051A   02039.23703031 -.00000027  00000-0  00000+0 0  2028
    2 26483  63.3979 159.5904 2704743 269.0424  60.1876  1.00280427  5242
    SIRIUS 3
    1 26626U 00077A   02038.90560428 -.00000130  00000-0  00000+0 0  1922
    2 26626  63.4718  39.1597 2708667 269.6736  59.5756  1.00275048  4370
    
    They might be visible mostly from North America, but I'm
    not really sure about that.  
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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