Re: Lacrosse-5 flares and disappearance.

From: Gerhard HOLTKAMP (
Date: Thu Oct 18 2007 - 08:57:49 EDT

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    on 14-OCT-07 Oleinikoff Nikolay wrote about Lacrosse 5 disappearances:
    >14 Aug 2007
    >In 20:14:53 - flare (? m.)
    >And 20:15:14 - disappeared.
    >In 20:17:03 - now re-appeared with flash +1.0 m.
    >And 20:17:15 - disappeared.
    >In 20:17:18 - now re-appearance +2.0 m. (+/-3s.)
    I just remembered having taken a few pictures of Lacrosse 5 at the time. The 
    first 15 sec exposure started at 20:11:44 UT, 14-AUG-07 and showed a very 
    bright (about mag 1.5) Lacrosse 5 trail. Shortly after the exposure was 
    finished the satellite quickly faded and I lost track of it in the bright 
    city sky of mine. But on a second photo I took at 20:12:37 UT it showed up as 
    a very weak trail at least 3 mag less than before. It must have disappeared 
    at about 20:12:15 UT. Checking with the times that Oleinikoff Nikolay found 
    (and assuming that this disappearance is intrinsic to the satellite and 
    doesn't depend on the observer) it would mean that it dissappeared on that 
    pass every two minutes. 
    Gerhard HOLTKAMP
    Darmstadt, Germany
    49.8822N,  8.6558E
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