Obs 30 Dec 2005 Part 3-last

From: Greg Roberts (grr@iafrica.com)
Date: Mon Jan 02 2006 - 10:32:35 EST

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    Observations 30 Dec 2005: Part 3-last)
    -----------------------------------------------------
    
    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,integrating for 96 frames
    which is equivalent to an exposure of 1.92 seconds per image.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    
    For CLASSFD.TLE:
    ----------------------------
    
    90041 05 775A   0433 G 20051230223230600 56 15 0626055+201802 39  +120 05
    90042 05 828A   0433 G 20051230213907100 56 15 0823268+062907 39  +120 05
    
    
    Strays seen:
    -------------
    
    23305 94 064A   0433 G 20051230214211500 56 15 0827167+052014 39  +120 05
    27409 02 017A   0433 G 20051230211217600 56 15 0751459+065414 39  +090 05
    27409 02 017A   0433 G 20051230211246400 56 15 0755540+055112 39  +090 05
    27409 02 017A   0433 G 20051230211304600 56 15 0758379+050912 39  +090 05
    
    Notes:
    -------
    
    (1) I have done much searching for #90041 since I failed to see it about
        two weeks ago.Finally I MAY have gotten an image of it. It was very
        faint but the pixel involved slowly got brighter during the 1 minute
        I had it in the field of view. It is definately not a hot or dead
        pixel - however I would not be prepared to say with certainty that
        it was #90041. Pixels do funny things when its hot.
    
    (2) Re missing unknown #91052 discovered on 28th December.I examined the
        two frames in which I had an unknown satellite and I am totally
        convinced that it was a satellite. In the first frame it appeared a
        little diffuse, elongated slightly along the x axis (azimuth),on the
        left hand side of the frame and quite bright at about magnitude +10
        ( the field limit was about +12).
    
        In the second frame, taken a minute later and moved approximately
        2 degrees in azimuth , it is still slightly elongated and now at the
        right edge of the frame but not so diffuse and slightly brighter
        than the first image. (I am here referring to the integrated images).
        Looking at the first frame in  "real" time one can see the pixel
        involved varying slightly in  brightness so the satellite is
        variable.
    
        In view of how prominent the two images were I fail to understand
        why I was not able to acquire it again on the 30th December,2005.
        (unless it has a long period of invisibility?).
    
        I have not yet given up on this object ( nor #90041)
    
    (3) If it stays clear I will track tonight ( 2nd Jan 2006)
    
    
    Cheers
    Greg
    
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