Optical 11 Sept 2008 Part 1

From: Greg Roberts (grr@telkomsa.net)
Date: Fri Sep 12 2008 - 14:11:56 UTC

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    Observations 11 Sep 2008 Part 1
    -------------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    Camera mount now carries two systems that can be operated
    together as two totally different sytems and computers used.
    Generally the DSI Pro II camera will be used for high altitude
    slow moving objects. Tests seem to indicate that its sesnitivity
    is comparable to the MINTRON ( possibly better) but as its not
    possible (?) to time stamp to better than 1 second accuracy the
    time resolution is not good enough for LEO objects.
    
    (1) 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 135mm focal length f/2.8 lens,integrating for 128 frames
    which is equivalent to a max exposure of 2.56 seconds maximum
    per image. Field of view 2.7 x 2.1 degrees.
    Individual frames are video time stamped with GPS derived signal.
    
    (2)Meade DSI Pro II Monochrome CCD camera without filters.
    using integration times of 20 sec min to 60 seconds maximum
    depending on brightness of sky in particular area.No image
    processing done but dark field applied.
    Used with 200mm focal length f/2.8 Nikkon telephoto lens,
    field of view 1.88 x 1.40 degrees. Can get to magnitude 13
    or so in less than 20 seconds exposure.
    Exposure time to nearest second inserted into image FITS header
    from PC clock which is automatically checked every minute against
    GPS signal.
    
    
    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:
    -----------------------
    
    19976 89 035A   0433 E 20080911172755000 56 15 2025019-002056 39  +090 05
    19976 89 035A   0433 E 20080911173423000 56 15 2031573-001800 39  +095 05
    26880 01 033A   0433 E 20080911174552000 56 15 2214125+012616 39  +095 05
    26880 01 033A   0433 E 20080911175044000 56 15 2219067+012522 39  +095 05
    90066 05 667A   0433 E 20080911175528000 56 15 1739291+033439 39  +090 05
    90066 05 667A   0433 E 20080911180020000 56 15 1744233+032910 39  +090 05
    26635 00 080A   0433 E 20080911180511000 56 15 1633435+040615 39  +095 05
    26635 00 080A   0433 E 20080911181003000 56 15 1638342+040306 39  +095 05
    96029 96 529A   0433 E 20080911182606000 56 15 2220372-052113 39  +120 05
    96029 96 529A   0433 E 20080911183058000 56 15 2225351-051347 39  +120 05
    96094 96 594A   0433 E 20080911183442000 56 15 2226190-035141 39  +125 05
    96094 96 594A   0433 E 20080911184020000 56 15 2230594-033708 39  +125 05
    05851 72 010A   0433 E 20080911193041000 56 15 0017205+102541 39  +115 05
    05851 72 010A   0433 E 20080911193438000 56 15 0021166+103741 39  +115 05
    96050 96 550A   0433 E 20080911194227000 56 15 1740290-084553 39  +125 05
    96050 96 550A   0433 E 20080911194718000 56 15 1745292-084012 39  +125 05
    96054 96 554A   0433 E 20080911200439000 56 15 2157272+012115 39  +125 05
    96054 96 554A   0433 E 20080911200930000 56 15 2202108+013938 39  +125 05
    09803 77 007A   0433 E 20080911201513000 56 15 2107006-034539 39  +110 05
    09803 77 007A   0433 E 20080911202005000 56 15 2111384-032811 39  +110 05
    96058 96 558A   0433 E 20080911202759000 56 15 2051521-095020 39  +125 05
    96058 96 558A   0433 E 20080911203210000 56 15 2055506-093745 39  +125 05
    22915 93 074A   0433 E 20080911213320000 56 15 0104378+005326 39  +105 05
    22915 93 074A   0433 E 20080911213802000 56 15 0109224+005631 39  +105 05
    96070 96 570A   0433 E 20080911214025000 56 15 0149069+052127 39  +120 05
    96070 96 570A   0433 E 20080911214552000 56 15 0154451+051913 39  +120 05
    96070 96 570A   0433 E 20080911214925000 56 15 0158287+051756 39  +120 05
    25336 98 029A   0433 E 20080911220730000 56 15 0044532+045559 39  +075 05
    25336 98 029A   0433 E 20080911221112000 56 15 0048410+050435 39  +075 05
    90005 99 804A   0433 E 20080911221646000 56 15 0026423+045154 39  +095 05
    90005 99 804A   0433 E 20080911222043000 56 15 0030319+050024 39  +095 05
    20253 89 077A   0433 E 20080911225034000 56 15 2055564-041408 39  +110 05
    20253 89 077A   0433 E 20080911225517000 56 15 2100434-041344 39  +110 05
    21805 91 080B   0433 E 20080911225833000 56 15 1921100-053256 39  +120 05
    21805 91 080B   0433 E 20080911230400000 56 15 1926424-053803 39  +120 05
    26575 00 065A   0433 E 20080911230746000 56 15 2126469+052215 39  +105 05
    26575 00 065A   0433 E 20080911231313000 56 15 2132175+052124 39  +105 05
    
    
    Unknowns seen - geostationary drifters:
    ----------------------------------------------
    99991 08 255GEO 0433 E 20080911214025000 56 15 0146325+044047 39  +100 05
    99991 08 255GEO 0433 E 20080911214552000 56 15 0151280+044317 39  +100 05
    99991 08 255GEO 0433 E 20080911215403000 56 15 0158489+044731 39  +100 05
    99991 08 255GEO 0433 E 20080911215629000 56 15 0200585+044830 39  +100 05
    
    99992 08 255GEO 0433 E 20080911221112000 56 15 0051023+041002 39  +100 05
    
    
    Notes:
    -------
    
    (1) One of those rare near perfect nights except for the bright moon.
    
    (2) 96029 - magnitude +12 steady
    
    (3) 96094 - magnitude +12.5 with small variations < 0.5 magnitude
    
    (4) 96043 = DSP-F3 -  mag +11.0/+12.0 ---one weak flash
    
    (5) 96050 - magnitude +12.5 - slow variation with amplitude of about 1
        magnitude
    
    (6) 96054 - magnitude +12.5 - looked reasonably constant
    
    (7) 96057 = DSP-F7 - major regular flashes to +11, minimum barely visible
        around mag +13
    
    (8) 96058 - magnitude mostly +12.5 with occassional single flash to
        about magnitude +11.0
    
    (9) 96070 - magnitude +12 steady
    
    (10) Two unknowns seen, both about +10 steady in inclined orbits .
         Able to get several positions on the first one, called 99991 but
         only one position on the second as it came into the exposure frame
         only at the end of the last exposure and only picked it up when
         measuring.
    
    (11) Sky seemed to be full of geostationary or near geostationary
         satellites. Had two fields with 5 satellites and one field with
         six and I was not even looking at areas where there is a high density
         of satellites.
    
    (12) Several satellites could not be done as the background star density
         was too high with literally hundreds of stars in the 1.8 x 1.4 degree
         field of view - blame the milky way!
    
    (13) Will report the remaining satellites- mostly geosats, but not
         classifed tomorrow - approximately 27. These were seen by accident
         whilst looking for specific targets.
    
    Cheers
    Greg
    
    
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