Obs 06 June 2006-all

From: Greg Roberts (grr@iafrica.com)
Date: Wed Jun 07 2006 - 05:31:38 EDT

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    Observations 06 June 2006:
    ---------------------------------
    
    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 100mm focal length f/1.8 lens,integrating for 128 frames
    which is equivalent to an exposure of 2.56 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
    
    Not a good night - bright moon and thin cirrus
    
    For CLASSFD.TLE
    -----------------------
    
    90027 04 841A   0433 P 20060606163723400 56 15 1000300+314604 39  +075 05
    90027 04 841A   0433 P 20060606163736400 56 15 1001005+315441 39  +075 05
    90027 04 841A   0433 P 20060606163825800 56 15 1002546+322643 39  +075 05
    90027 04 841A   0433 P 20060606164016800 56 15 1007081+333305 39  +080 05
    90027 04 841A   0433 P 20060606164110600 56 15 1009084+340709 39  +080 05
    90004 99 750A   0433 P 20060606181038600 56 15 1600080-705223 39  +078 05
    90004 99 750A   0433 P 20060606181041100 56 15 1604434-705652 39  +090 05
    90004 99 750A   0433 P 20060606181043500 56 15 1609225-710131 39  +080 05
    90004 99 750A   0433 P 20060606181045900 56 15 1613254-710418 39  +090 05
    90004 99 750A   0433 P 20060606181048300 56 15 1618328-710819 39  +084 05
    
    Strays seen:
    -------------
    
    Meteor 2-10 steady
    14452 83 109A   0433 P 20060606172858100 56 15 1121404+060110 39  +055 05
    Feng Yun 1A Rkt variable
    19468 88 080B   0433 P 20060606172630500 56 15 1105185+050559 39  +080 05
    Iridium 32 steady
    24945 97 051B   0433 P 20060606170350100 56 15 1059252+062456 39  +055 05
    Cosmos 2251 rkt variable
    24945 97 051B   0433 P 20060606171443200 56 15 1109022+064343 39  +085 05
    
    
    Yet another unknown !?
    --------------------------
    
    91070 06 157MEO 0433 P 20060606174234100 56 15 1004282+124759 39  +080 05
    91070 06 157MEO 0433 P 20060606174235900 56 15 1005158+125820 39  +080 05
    91070 06 157MEO 0433 P 20060606174237700 56 15 1005584+130659 39  +081 05
    91070 06 157MEO 0433 P 20060606174239500 56 15 1006413+131658 39  +081 05
    91070 06 157MEO 0433 P 20060606174241300 56 15 1007211+132609 39  +082 05
    91070 06 157MEO 0433 P 20060606174243100 56 15 1008033+133521 39  +083 05
    91070 06 157MEO 0433 P 20060606174244900 56 15 1008510+134423 39  +085 05
    
    
    Notes:
    -------
    
    (1) Last possible observation of #90027 for me till next "season".Now
        twilight sky too bright.
    
    (2) #90004 located thanks to Ivan Artner's radio observations.Using
        doppler observations of the satellites transmitter he is able to
        determine the time of closest aproach (TCA) and compare this against
        what is predicted to determine the "error" in the prediction. He
        informed me that he found the satellite to be running about 13
        minutes early. I found the satellite with no problems running about
        11 min 18 sec early on SDP4 predictions for this object. Now
        that this satellite is "out the way" Ill now go for the next one
        currently visible (#90028) and for which Art has determined the
        error. To make matters more interesting Art has picked up signals
        which do not match candidates in CLASSFD.TLE so there are
        possibly still more satellites to be found - as if we havent got
        enough!
    
    (3) Another possible unknown sighted crossing edge of field of view.
        This was essentially steady with maybe a small variation in
        magnitude. Looks like a low inclination object. It is becoming
        increasingly obvious that there are a lot of large objects not
        catalogued,most of them in low inclination orbits. Im not looking
        for them - they find me!
    
    (4) Many thanks to Ed Cannon for his comments recently ( 1st June -
        "Re Current lost unknown" ) - identification of all these unknowns
        is beyond me so its up to our experts Ted, Mike and others. Im
        merely an observer/experimenter/doddera .
    
    Cheers
    Greg
    
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