Optical 10 Sept 2008

From: Greg Roberts (grr@telkomsa.net)
Date: Thu Sep 11 2008 - 09:55:01 UTC

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    Observations 10 Sept 2008
    --------------------------------
    
    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:
    ---------------------------
    
    26635 00 080A   0433 P 20080910171658000 56 15 1541438+044056 39  +105 05
    26635 00 080A   0433 P 20080910172452000 56 15 1549501+043518 39  +105 05
    14675 84 009A   0433 P 20080910173247000 56 15 1532573-013855 39  +090 05
    14675 84 009A   0433 P 20080910173536000 56 15 1536204-014244 39  +090 05
    14675 84 009A   0433 P 20080910173908000 56 15 1540378-014631 39  +090 05
    23223 94 054A   0433 P 20080910174603000 56 15 1450262+071050 39  +090 05
    23223 94 054A   0433 P 20080910174831000 56 15 1452549+070712 39  +090 05
    23223 94 054A   0433 P 20080910175135000 56 15 1456002+070317 39  +090 05
    23967 96 042A   0433 P 20080910202243000 56 15 1752237+021836 39  +120 05
    23967 96 042A   0433 P 20080910202406000 56 15 1753457+021729 39  +120 05
    23967 96 042A   0433 P 20080910202652000 56 15 1756321+021543 39  +120 05
    90082 08 731A   0433 P 20080910181842000 56 15 1624521+351558 39  +105 05
    90082 08 731A   0433 P 20080910182731500 56 15 1640026+282008 39  +095 05
    90082 08 731A   0433 P 20080910183715700 56 15 1659458+171530 39  +090 05
    90082 08 731A   0433 P 20080910185549400 56 15 1828048-421003 39  +065 05
    90082 08 731A   0433 P 20080910190057700 56 15 2121283-715314 39  +065 05
    90082 08 731A   0433 P 20080910190806400 56 15 0355063-580016 39  +075 05
    
    Strays seen:
    ------------
    IRIDIUM 82
    25467 98 051A   0433 P 20080910183010400 56 15 1639170+254628 39  +070 05
    COSMOS 1733
    16611 86 018A   0433 P 20080910183715700 56 15 1700250+163945 39  +045 05
    BREEZE M DEBRI  range 10550 kms, variable
    28359 04 022B   0433 P 20080910172222100 56 15 1546210+032830 39  +075 05
    RADARSAT
    23710 95 059A   0433 P 20080910174539700 56 15 1450440+071211 39  +075 05
    ATLAS CENTAUR 2
    00694 63 047A   0433 P 20080910175217800 56 15 1606460+053042 39  +030 05
    
    
    Notes:
    --------
    
    (1) As usual conditions were poor with much cloud drifting about. Matters
        were not helped by a bright overhead moon. My middle name is now CLOUD
        WATCHER as this is all I seem to do.
    
    (2) UFO-F7 difficult due to bright moon and the continual cloud which
        prevented a reasonably long integration of the image.
    
    Cheers
    Greg
    
    
    
    
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