Obs 25/28 October,2005

From: Greg Roberts (grr@iafrica.com)
Date: Wed Nov 02 2005 - 04:13:31 EST

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    Observations 25/28 Oct 2005:
    --------------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    MINTRON low light level CCD surveillance camera (0.005 lux typical
    in non integration mode) and 0.00005 lux in STARLIGHT mode with 128
    frame integration.
    
    Used with 145mm focal length f/2.5 lens. I normally integrate for
    96 frames for geostationary objects which is equivalent to an
    exposure of 1.92 seconds per image. Successive images are then
    stacked on top of one another 200 times, giving an effective total
    exposure of 200*1.92 seconds = 384 seconds. Stars show up as trailed
    objects whilst geostationary satellites appear as dots if the
    inclination is close to 0 degrees or else as slightly trailed
    objects, the length of the trail depending on the inclination and
    altitude.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    
    Correction 28th October, 2005 - 60 mm focal length lens:
    ------------------------------------------------------------------
    
    The observation of 90013 on 28 Oct had an incorrect time - out by one hour.
    (no comment !)
    The correct observation is as below:
    
    90013 03 546A   0433 G 20051028211146800 56 15 0247400+092117 39
    
    Observations 25th October 2005:
    ----------------------------------------
    
    Following observations made 25 October with usual 145mm lens but since
    I had one of the settings incorrect it was not integrating so I was
    loosing about 2- 3 magnitudes, making most geostationaries too faint
    to measure with certainty.
    
    27168 02 001A   0433 G 20051025201651000 56 15 2241386+055604 39
    90013 03 546A   0433 G 20051025201918500 56 15 0144195+072215 39
    90037 05 638A   0433 G 20051025204210100 56 15 0403233+101909 39
    90003 99 503A   0433 G 20051025205646200 56 15 0104452+025231 39
    90036 05 629A   0433 G 20051025210322800 56 15 0434353+071110 39
    
    
    Notes:
    ------
    (1) The observation of an object suspected as 96072A on 30th October is
        NOT 96072A since Tony Beresford saw it on time. I missed it at the
        predicted time due to it being too faint to be seen and a fair
        amount of cirrus. It is likely that the object reported as 96072A
        may be the rocket of USA 186 - further observations are needed.
    
    (2) #90003 flashes roughly every 21 seconds.
    
    Cheers
    Greg
    
    
    
    
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