Obs 11 July Part 1

From: Greg Roberts (grr@iafrica.com)
Date: Tue Jul 12 2005 - 12:27:44 EDT

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    Observations 09/11 Jul 2005:
    ---------------------------------------
    
    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 50mm focal length f/1.8 lens,integrating for 64 frames.
    Field of view 6.81 by 5.37 degrees  - image quality good.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    
    27168 02 001A   0433 F 20050709205711200 56 15 1616150+031737 39  +090 05
    27712 03 012B   0433 F 20050709205711200 56 15 1630050+032208 39  +095 05
    28187 04 008A   0433 F 20050709205711200 56 15 1629510+052600 39  +100 05
    
    23533 95 015A   0433 F 20050711163206600 56 15 1901000-291420 39
    23533 95 015A   0433 F 20050711163255700 56 15 1831450-215337 39
    23533 95 015A   0433 F 20050711163359900 56 15 1756240-101658 39
    28646 05 016A   0433 F 20050711163542800 56 15 0647290-470025 39
    28646 05 016A   0433 F 20050711163640400 56 15 0748130-474635 39
    28646 05 016A   0433 F 20050711163756400 56 15 0952330-420649 39
    25489 98 055A   0433 F 20050711164004200 56 15 1349220+253107 39
    25489 98 055A   0433 F 20050711164036400 56 15 1349120+312554 39
    07816 75 043A   0433 F 20050711164237800 56 15 2209470-763330 39
    07816 75 043A   0433 F 20050711164300200 56 15 2309060-753640 39
    25157 98 007A   0433 F 20050711165453000 56 15 1635370-785705 39
    25157 98 007A   0433 F 20050711165622600 56 15 1230310-492434 39
    25157 98 007A   0433 F 20050711165747100 56 15 1142480-090016 39
    05679 71 110B   0433 F 20050711165856200 56 15 1048110-464027 39  +065 05
    05679 71 110B   0433 F 20050711165942300 56 15 1143210-331218 39
    05679 71 110B   0433 F 20050711170039900 56 15 1233500-131606 39
    25724 99 023A   0433 F 20050711170039900 56 15 1239140-112527 39
    25724 99 023A   0433 F 20050711170129800 56 15 1306050-110153 39
    25724 99 023A   0433 F 20050711170251700 56 15 1347160-095734 39
    09415 76 091A   0433 F 20050711170439300 56 15 1508220+162911 39
    09415 76 091A   0433 F 20050711170606300 56 15 1458100-123510 39
    09415 76 091A   0433 F 20050711170802800 56 15 1425540-680232 39
    18025 87 043H   0433 F 20050711171249500 56 15 1137040+140145 39
    24753 97 012A   0433 F 20050711173249300 56 15 1615020-123349 39
    24753 97 012A   0433 F 20050711173321300 56 15 1554290-013211 39
    24753 97 012A   0433 F 20050711173434200 56 15 1516450+193136 39
    25615 98 055C   0433 F 20050711173913300 56 15 0803360-540948 39
    25615 98 055C   0433 F 20050711174010900 56 15 0914500-432508 39
    25615 98 055C   0433 F 20050711174136700 56 15 1031230-172424 39
    25615 98 055C   0433 F 20050711174334500 56 15 1129390+164326 39
    23862 96 029D   0433 F 20050711175246100 56 15 1713290+092119 39
    23908 96 029C   0433 F 20050711175246100 56 15 1709420+102134 39
    23936 96 029E   0433 F 20050711175246100 56 15 1710310+104454 39
    90016 03 766A   0433 F 20050711180100000 56 15 1435360+022526 39
    90013 03 564A   0433 F 20050711180532800 56 15 1633230-011503 39
    
    UKNOWN:
    
    91035 05 192LEO 0433 F 20050711173331500 56 15 1544410+015012 39
    91035 05 192LEO 0433 F 20050711173332800 56 15 1544560+014114 39
    91035 05 192LEO 0433 F 20050711173339300 56 15 1546420+011209 39
    91035 05 192LEO 0433 F 20050711173343100 56 15 1547450+005636 39
    91035 05 192LEO 0433 F 20050711173344300 56 15 1548060+004933 39
    
    
    Corrections:
    ---------------
    
    Previous report I gave the lens used as 25m focal length f/1.4
    lens. As usual I was writing rubbish and it should read 25mm.
    
    The flashing geostationary satellite observed on the 8th was
    NOT SATCOM 1 but RADUGA 27 #21132. The period was determined
    to be about 51.57 seconds.
    
    Notes:
    --------
    
    (1) Testing out 50mm lens from a photogragphic 35mm camera on
        the 9th and 11th July.
    
        Technique used on the 9th was the same as that used on the
        8th July and nothing exciting observed.Tried a few geostationaries
        but the majority were not visible no matter how long I integrated so ,
        for my bright city lit skies, a  50mm lens is not sensitive enough for
        the majority of  geostationary satellites.
    
    (2) I decided to do tracking of the leo satellites in CLASSFD.TLE
        on the 11th July using the 50mm lens and the first half of results are
        reported above. Generally its nice to have such  a large field of view
        as many "strays" were seen. The downside is that I was generally unable
        to see LEO satellites fainter than about 7.0-7.5 magnitude without the
        mount tracking on the satellites, despite being able to see stars down to
        almost magnitude 11 on the monitor in real time.
    
        Satellites I could normally easily see with my usual lens of 145mm focal
        length were not seen.The large image scale also  results in poor positional
        accuracy so I would not recommend a 50mm focal length lens for serious
        positional work.
    
    (3) Another unknown was seen but I suspect its the same one reported on the
        9th July as #91034. Appearance was similar  as well as direction of travel ,
        time and position etc.Again  it was difficult to get accurate positions from
        the short  trails produced as the object was variable, ranging from perhaps
        +6.5 mag to invisible with a short period so  sometimes the object faded out
        before the end of the trail. I only managed to get a small arc as I was 
    following
        #24753.
    
    (4) Hopefully I will tomorrow report the remaining objects  observed which 
    include
    
        NOSS 3-2 rocket, DMSP B5D2-8, USA 144, DMSP B5D2-6,
        Noss 2-1 triplet, USA 89r, Noss 3-2 duo, DMSP 5D-2 S-14,
        USA 179 CnR, and perhaps #90033,#90035, and #90037 if long
        integrations will render them visible.
    
    Cheers
    Greg
    
    
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