Optical 10 Dec 2013 Part 2

From: Greg Roberts (grr@telkomsa.net)
Date: Thu Dec 12 2013 - 13:09:19 UTC

  • Next message: Marco Langbroek: "Re: Optical 10 Dec 2013 Part 2"

    Observations 10 Dec 2013 Part 2
    ------------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    
    FLI ML8300M CCD camera with mechanical shutter + Trimble GPS
    
    Used with 135mm focal length f/2.8 TAMRON lens.
    Field of view 7.6 x 5.7 degrees.
    Some images processed and measured manually whilst remainder
    automatically using APEX.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
    Elevation 10 metres-situated in Pinelands (Cape Town),South Africa
    
    FOR CLASSFD.TLE:
    ---------------------
    25615 98 055C   0433 G 20131210185055341 16 15 2341449+304853 29
    25615 98 055C   0433 G 20131210185110543 16 15 2340041+282008 28
    25615 98 055C   0433 G 20131210185115607 16 15 2339272+272559 48
    25615 98 055C   0433 G 20131210185120719 16 15 2338505+263337 18
    25724 99 023A   0433 G 20131210190722037 16 15 0246469-113026 18
    25724 99 023A   0433 G 20131210190732120 16 15 0253558-111904 18
    25724 99 023A   0433 G 20131210190742223 16 15 0301072-110643 18
    25724 99 023A   0433 G 20131210190938298 16 15 0419433-075435 28
    25724 99 023A   0433 G 20131210190953436 16 15 0429074-072501 28
    25724 99 023A   0433 G 20131210191008582 16 15 0438133-065521 18
    28637 05 011B   0433 G 20131210184140334 16 15 1913045-483353 28
    28637 05 011B   0433 G 20131210184220790 16 15 1945118-395410 28
    28637 05 011B   0433 G 20131210184241250 16 15 1958173-350542 28
    36105 09 066B   0433 G 20131210190029534 16 15 0754313-221439 28
    36105 09 066B   0433 G 20131210190033665 16 15 0752118-213824 28
    39025 12 071A   0433 G 20131210191820720 16 15 2119312-121446 28
    39025 12 071A   0433 G 20131210191839002 16 15 2127213-183818 28
    39025 12 071A   0433 G 20131210191912501 16 15 2149522-353230 28
    39025 12 071A   0433 G 20131210191933782 16 15 2217208-500451 38
    39025 12 071A   0433 G 20131210192028732 16 15 0459095-760741 38
    39025 12 071A   0433 G 20131210192047009 16 15 0658306-690431 28
    39025 12 071A   0433 G 20131210192114424 16 15 0758151-583254 38
    39025 12 071A   0433 G 20131210192135751 16 15 0818383-521650 18
    39025 12 071A   0433 G 20131210192154051 16 15 0830144-475121 28
    
    STRAYS SEEN:
    ---------------------
    18794 88 002G   0433 G 20131210185110543 16 15 2331055+275101 28
    18794 88 002G   0433 G 20131210185115607 16 15 2331435+282416 48
    18794 88 002G   0433 G 20131210185120719 16 15 2332207+285655 18
    18794 88 002G   0433 G 20131210185125806 16 15 2332533+292850 79
    20720 90 066A   0433 G 20131210190757367 16 15 0235382-145644 28
    20720 90 066A   0433 G 20131210190802425 16 15 0236538-134411 18
    20720 90 066A   0433 G 20131210190807465 16 15 0237506-123335 18
    20720 90 066A   0433 G 20131210190812507 16 15 0238474-112057 18
    37743 11 033E   0433 G 20131210192013498 16 15 0138431-761019 38
    
    NOTES:
    ----------
    (1) Ive done three plane searches for USA 186 #28888 and so far
        failed to recover it. Two were partials planes of about 70
        minutes each whilst the last one was about 160 minutes with
        good conditions. Despite careful examination of all 2000 odd
        images secured several times no unknown object was detected.
        Either USA 186 has been de-orbited or, more likely, the
        transit height over my location has been decreased and the
        satellite may have been in shadow at the point of the orbit
        examined which was about 20 seconds early on predicted
        eclipse entry point.  One more plane search will be done and
        selecting a point on the orbit further away from predicted
        shadow entry. Approximately 50 satellites were observed and
        identified during the 160 minute span with satellites as
        faint as magnitude +8. USA 186 should have been around mag
        +3 or +4 so should have been easy.
    (2) PAN still on predicted location so did not bother to measure
        it.
    
    Cheers
    Greg
    
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