USA 144/Misty-2 Deb/Decoy tumbling periodicity photometry

From: Marco Langbroek (
Date: Sat Aug 29 2009 - 23:37:31 UTC

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    Hi all,
    On August 25 and August 27, I obtained a series of photographs of the USA 
    144/Misty-2 decoy (99-028C). On the request of Pierre Neirinck, I did some 
    simple photometry on the image series, to see whether I could retrieve 
    information out of this on the current tumbling period of the object.
    The results are very nice (and better than Pierre and me expected), and I 
    obtained a nice diagram of the brightness variation. The brightness behaviour 
    can be approximated by a sinusoid with a period of 71 seconds.
    A short report with the images used and the diagrams derived can be read here:
    - Marco    :-)
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    Station (b)log:
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