Obs ML (4352) 3 Sept 2005: Lacrosse 4

From: Marco Langbroek (marco.langbroek@wanadoo.nl)
Date: Sat Sep 03 2005 - 16:53:43 EDT

  • Next message: Marco Langbroek: "Re: Obs ML (4352) 3 Sept 2005: Lacrosse 4"

    Obs SatTrackCam Leiden (Cospar 4352), 3 Sept 2005:
    
    26473 00 047A   4352 P 20050903194110800 17 75 2100523+150410 56 I+025 10
    26473 00 047A   4352 P 20050903194121500 17 75 2115468+179810 56 I+015 10
    
    Method: Canon Digital Ixus 400 + ASTRORECORD astrometric software.
    Camera at manual mode, "10 second" (= 10.7 second) exposure, wide field
    f2.8/7.41 mm.
    
    What these numbers mean:
    http://www.satellite.eu.org/position/IODformat.html
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    Poor, hazy conditions. First point might be off as start of trail is faint. 
    Second point should  be reliable, is fat and bright on the image.
    
    Lacrosse 4 was increasing in brightness during the exposure and gave a short 
    Iridium-like flare of about magnitude +0.5 some ~10 seconds after the end of the 
    exposure.  The onset of this flare is just captured in the image, the end of the 
    trail suddenly becomes bright and fat.
    
    Saw a bright negative magnitude (-1 to -2) sat low in the sky descending to the 
    northeast horizon some 10-15 minutes earlier while checking the sky quality.
    
    - Marco  :-)
    
    -----
    Dr Marco Langbroek  -  SatTrackCam Leiden, Cospar 4352
    Leiden, the Netherlands, 52.15894 N, 4.48883 E (WGS84), +5 m ASL
    
    SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html
    Station (b)log: http://sattrackcam.blogspot.com
    e-mail: meteorites@dmsweb.org
    -----
    
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