Re: Lacrosse 4 observed Flaring, & Lacrosse 5 "disappearance trick"

From: Bruce MacDonald (macdonalddevizes@tiscali.co.uk)
Date: Sat Jan 20 2007 - 15:06:38 EST

  • Next message: Marco Langbroek: "Re: Lacrosse 4 observed Flaring, & Lacrosse 5 "disappearance trick""

    > hi all,
    >
    > This evening was very clear (and a bit windy). I observed a fine flare 
    > from Lacrosse 4 (00-047A). Just before going into eclips in Taurus, it 
    > briefly flared to mag. +0.5 at about 18:53:00 +/- 1s UTC. The flare took 
    > only a few seconds.
    <snip>
    > Some 20 minutes earlier, I observed Lacrosse 5 (05-016A) doing its 
    > notorious "disappearance trick" again in Umi. It happened at 18:31:27 +/- 
    > 2 s UTC, some 1.5 minutes before eclipse entry. The camera was open while 
    > it happened, image at the same URL above. Before that, Lacrosse 5 was 
    > about mag. +1.5.
    
    
    I have just watched the same passes as Marco and confirm the "disappearance" 
    of 05-016A.
    
    I estimated the magnitude before the dip as being +2.0, fading to mag +4.5 
    and still further to around mag 5.5 before shadow entry.
    
    I did not see the flare of 00-047A, though.
    
    Bruce MacDonald
    COSPAR Site 2751
    Devizes, Wiltshire, United Kingdom
    51.3440 N 1.9849 W 125M (WGS 84) 
    
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