Unknown 13 March 2011

From: Greg Roberts (grr@telkomsa.net)
Date: Mon Mar 14 2011 - 11:57:28 UTC

  • Next message: Kevin Fetter: "Re: Unknown 13 March 2011"

    Observations 13 Mar 2011
    ----------------------------
    
    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 sensitivity
    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 12.5mm focal length f/1.8 lens,integrating for 128 fields
    which is equivalent to a max exposure of 2.56 seconds maximum
    per image, but dependent on sky brightness. Field of view
    26.5 x 21.4 degrees.
    Individual frames are video time stamped with GPS derived signal.
    Images processed and measured manually.
    
    
    Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
    Elevation 10 metres-situated in Pinelands (Cape Town),South Africa
    
    
    UNKNOWN:
    ============
    99995 99 999A   0433 F 20130313180618200 56 15 0833290+261511 39  +040 05
    99995 99 999A   0433 F 20130313180701200 56 15 0915210+261437 39  +040 05
    
    
    Notes:
    ------------
    (1) Unknown seen for which I have no obvious match. Magnitude +4 or so
        and regular flashing. NOT a bird or aeroplane.
    
        Rough orbit calculation gives
    
        inclination 141.2 degrees, period 109.8 minutes, height 1220 kms,
        RA Node 227.8 degrees. Std magnitude +3.7
    
        Only objects in this kind of orbit are Israeli launches ?
    
        Puzzling.
    
    Cheers
    Greg
    
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