Lacrosse 5 Disappearance Trick

From: Gerhard HOLTKAMP (
Date: Tue Aug 21 2007 - 16:35:59 EDT

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    After evaluating the picture I've taken yesterday, I have some better data 
    about the disappearance of Lacrosse 5 (2005-016A): Fading started at 19:53:54 
    UTC, 20-AUG-07, some 2 sec before the end of my 15 sec exposure. It must have 
    gone on for another second before it would have been invisible to my camera 
    (and there was no trail visible on the next picture I took half a minute 
    Although 3 seconds seem to be a typical time for the fading of Lacrosse 5 
    there have been variations to the theme in the past. Sometimes it seems to 
    take just one second. There have also been instances of a stepwise fading, 
    going down 2 mag within a second and then a few seconds later another sudden 
    drop in magnitude. We should try to report not just the time of fading but 
    also the speed of it. This might give us some more information to play around 
    with when investigating this behaviour.
    Like a good magician on stage Lacrosse 5 keeps its audience (certainly me) 
    captivated by introducing some variations into its disappearance trick. Many 
    thanks to the designers and operators of Lacrosse 5 (if any of you folks are 
    listening in) for coming up with such an always exiting to watch satellite  
    (they are going to hate me for this!).
    Gerhard HOLTKAMP
    Darmstadt, Germany
    49.8822N, 8.6558 E
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