Obs 27 and 28th July 2005

From: Greg Roberts (grr@iafrica.com)
Date: Fri Jul 29 2005 - 12:59:38 EDT

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    Observations 27/28 July 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.
    
    27th July: Used with 37mm focal length f/3.5 lens.Field of view
    9.1 x 7.2 degrees and can see stars down to about magnitude 8.8.
    
    28th July: Used with 50mm focal length f/1.8 lens.Field of view
    6.9 x 5.4 degrees and can see stars down to mag 11.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    
    Usual Unknown: -I think it deserves a proper number :-))) 
    -------------------
    70000 00 000A   0433 G 20050728163449600 56 15 1603140-111528 39
    70000 00 000A   0433 G 20050728163554300 56 15 1630250-180355 39
    70000 00 000A   0433 G 20050728163653000 56 15 1700300-244134 39
    70000 00 000A   0433 G 20050728163816100 56 15 1752440-333229 39
    70000 00 000A   0433 G 20050728163922100 56 15 1842080-391834 39
    70000 00 000A   0433 G 20050728164056000 56 15 1958410-441033 39
    70000 00 000A   0433 G 20050728164304300 56 15 2132130-444822 39
    
    Strays:
    ---------
    SL-8 R/B
    11681 80 007B   0433 G 20050727164156500 56 15 1756060-335200 39  +040 05
    SL-8 R/B
    09638 76 128B   0433 G 20050727165005200 56 15 1636010-012002 39  +060 05
    Globalstar MO19
    25677 99 019B   0433 G 20050727165852200 56 15 2022130-280029 39  +055 05
    SJ-6B
    28414 04 035B   0433 G 20050727171300900 56 15 1503440+004300 39
    ERBS
    15354 84 108B   0433 G 20050727173258000 56 15 0826230-533522 39  +050 05
    Cobe
    20322 89 089A   0433 G 20050727173446500 56 15 0932310-460110 39  +060 05
    Adeos
    24277 96 046A   0433 G 20050727174301900 56 15 0129230-745427 39  +045 05
    Cosmos 2414
    28521 05 002A   0433 G 20050727181905700 56 15 0407480-763207 39  +070 05
    Cosmos 2039
    20233 89 074B   0433 G 20050727183513400 56 15 0856390-705854 39  +050 05
    SL-8 R/B
    12092 80 099B   0433 G 20050728163907900 56 15 1826480-392339 39  +050 05
    Iridium 77
    25471 98 051E   0433 G 20050728165056600 56 15 1449500-085603 39  +050 05
    Cosmos 1091 variable
    11320 79 028A   0433 G 20050728165629400 56 15 1459230-115830 39  +075 05
    SL-8 R/B
    11681 80 007B   0433 G 20050728170538500 56 15 1424020+184033 39  +050 05
    Noaa 15
    25338 98 030A   0433 G 20050728171149800 56 15 1409100+171026 39  +060 05
    SL-8 R/B
    09638 76 128B   0433 G 20050728171248600 56 15 1414350+174220 39  +065 05
    
    Notes:
    --------
    
    (1) Managed to get one more track on #70000 in very bright sky.
    
    (2) The strays observed were seen by accident and identified afterwards.
    
        I have no interest in strays other than to determine if an unknown
        or not.
    
    (3) I have still to finish the remainder of the satellites (about a dozen) 
         observed on  the 28th July - probably all known strays.
    
    (4) The next lens to test is a telephoto with focal length ranging
        from 11mm to 70mm and operating at f/1.3. This came from a domestic
        video camera and is of very good quality. Earlier tests show stars
        easily down to magnitude 12 and it is very easy to motorize the
        variable focal length - simple matter of putting about +5v DC on
        two wires already attached to a small motor inside the lens and
        reversing polarity to zoom in or out.
    
    Cheers
    Greg
    
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