Obs 21 July 2005

From: Greg Roberts (grr@iafrica.com)
Date: Sat Jul 23 2005 - 11:24:19 EDT

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    Observations 21 July 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 150mm focal length f/2.8 lens. This is a telephoto lens
    with variable focal length 15 to 150 mms, manufactured in France by
    ANGENIEUX with model type number 10x15B and at least 15 years old
    with a healthy growth of lens fungus.
    
    Field of view 2.4 x 1.9 degrees at 150mm and about 22 x 19 degrees
    at 15mm focal length.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    
    28385 04 034B   0433 P 20050721170955600 56 15 2027250-510245 39
    28385 04 034B   0433 P 20050721171100900 56 15 2038439-504553 39
    28385 04 034B   0433 P 20050721171157500 56 15 2048439-502635 39
    28385 04 034B   0433 P 20050721171314300 56 15 2102066-495538 39
    19460 88 078A   0433 P 20050721172424400 56 15 0140465-860547 39
    19460 88 078A   0433 P 20050721172509600 56 15 1553139-824402 39
    19460 88 078A   0433 P 20050721172553700 56 15 1523053-681751 39
    19460 88 078A   0433 P 20050721172753700 56 15 1512210-095041 39
    26473 00 047A   0433 P 20050721172424400 56 15 0248560-851728 39
    90016 03 766A   0433 P 20050721174051400 56 15 1510223+013012 39
    90038 05 638B   0433 P 20050721174418500 56 15 1852378+024709 39
    90037 05 638A   0433 P 20050721174704900 56 15 1848509-080454 39
    23533 95 015A   0433 P 20050721172940300 56 15 2339144-661515 39
    23533 95 015A   0433 P 20050721173111500 56 15 2127467-714613 39
    23533 95 015A   0433 P 20050721173225400 56 15 1813452-664902 39
    25725 99 023B   0433 P 20050721175502900 56 15 1736236+260514 39
    25725 99 023B   0433 P 20050721175615800 56 15 1746525+241420 39
    25725 99 023B   0433 P 20050721175724000 56 15 1756238+223307 39
    23862 96 029D   0433 P 20050721175005300 56 15 1030131-104018 39
    23862 96 029D   0433 P 20050721175134600 56 15 1026301-251406 39
    23862 96 029D   0433 P 20050721175257100 56 15 1016205-410622 39
    23908 96 029C   0433 P 20050721175005300 56 15 1029043-094646 39
    23908 96 029C   0433 P 20050721175134600 56 15 1025353-240627 39
    23908 96 029C   0433 P 20050721175257100 56 15 1015285-395059 39
    23936 96 029E   0433 P 20050721175005300 56 15 1031027-092252 39
    23936 96 029E   0433 P 20050721175134600 56 15 1027591-234151 39
    23936 96 029E   0433 P 20050721175257100 56 15 1018368-392610 39
    09415 76 091A   0433 P 20050721180122100 56 15 1006233-340008 39
    09415 76 091A   0433 P 20050721180221600 56 15 0912008-430549 39
    09415 76 091A   0433 P 20050721180251400 56 15 0844484-460326 39
    07816 75 043A   0433 P 20050721180757600 56 15 1051106-093150 39
    07816 75 043A   0433 P 20050721180926900 56 15 0957053-264435 39
    07816 75 043A   0433 P 20050721181017800 56 15 0922445-341424 39
    28096 03 054B   0433 P 20050721181230200 56 15 1036474-272431 39
    28096 03 054B   0433 P 20050721181342200 56 15 1123116-175722 39
    28096 03 054B   0433 P 20050721181453300 56 15 1206455-061639 39
    21147 91 017A   0433 P 20050721181814900 56 15 0952333-105225 39
    21147 91 017A   0433 P 20050721181843700 56 15 1008286-062328 39
    21147 91 017A   0433 P 20050721181916400 56 15 1026208-005219 39
    25744 99 028A   0433 P 20050721182238900 56 15 0645423-723059 39
    25744 99 028A   0433 P 20050721182433100 56 15 0620022-804924 39
    25744 99 028A   0433 P 20050721182931700 56 15 2007170-713617 39
    25157 98 007A   0433 P 20050721182528800 56 15 1013053-420853 39
    25157 98 007A   0433 P 20050721182621700 56 15 1038503-272611 39
    25157 98 007A   0433 P 20050721182705800 56 15 1052037-155853 39
    
    
    Notes:
    ------
    (1) Herewith balance of observations secured 21 July 2005.
    
    (2) Many thanks to Scott Campbell and Ted Molczan for their
        contributions re the unknown observed (#91036).
    
        This one will probably remain unknown as the observed arc
        was far too short to do anything worthwhile with the
        positions - a situation that happens far too frequently.
        Unfortunately I do not have an easy solution as one needs
        to know instantly that the object is an unknown so that
        one can then follow it and get more observations.
    
        Predicting all objects beforehand is not a practical
        solution unless the CoSaTrak program could be re-written
        to show all predicted satellites in the field of view at
        any instant. At present this cannot be done as CoSaTrak
        does not have a prediction routine in it although this
        should not be too difficult to add - I must try and twist
        my colleague's (Willie Koorts) arm as he is the author
        of CoSaTrak. ( CoSaTrak is in Pascal and I program on the
        PC in BASIC.)
    
    Cheers
    Greg
    
    
    Cheers
    Greg
    
    
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