Obs 01st April 2005

From: Greg Roberts (grr@iafrica.com)
Date: Tue Apr 05 2005 - 11:47:46 EDT

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    Observations 01 April 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 145mm focal length f/2.5 lens giving a field of view of
    about 2.55 x 1.86 degrees and easily showing 12th magnitude stars.
    Not the best lens optically but the most useful in terms of field
    of view and magnitude penetration.
    
    Data recorded on DVD R/W disks - will be kept for 1 month and then
    re-used - just in case any queries as Im always making mistakes!
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    For CLASSFD.TLE:
    ~~~~~~~~~~~~~~~~~
    DSP20 (was reported for some time by me as 90017,then 90032,now as #26356
    26356 00 024A   0433 G 20050401181550800 17 15 0722576+063044 39  +095 05
    MILSTAR 5
    27168 02 001A   0433 G 20050401173623000 17 15 0624207+065950 39  +105 05
    
    Commercial and known objects:
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    INSAT 2C GEOSTATIONARY
    23731 95 067B   0433 G 20050401175159000 17 15 0638585+060550 39  +118 05
    SKYNET 4F GEOSTATIONARY
    26695 01 005B   0433 G 20050401175623700 17 15 0654112+063042 39  +085 05
    METEOSAT 6 GEOSTATIONARY
    22912 93 073B   0433 G 20050401180437700 17 15 0717113+082040 39  +110 05
    SIRIUS 3 GEOSTATIONARY ( MAY BE SIRIUS 2?)
    25492 98 056B   0433 G 20050401181147100 17 15 0704382+052519 39  +090 05
    INMARSAT 4F1 GEOSTATIONARY
    28628 05 009A   0433 G 20050401181550800 17 15 0725107+053446 39  +100 05
    SL-12 R/B 2 GEOSTATIONARY
    28466 04 043D   0433 G 20050401181550800 17 15 0717385+054135 39  +125 05
    EUTELSAT W3A GEOSTATIONARY
    28187 04 008A   0433 G 20050401181550800 17 15 0717541+052838 39  +130 05
    EUTELSAT W1 GEOSTATIONARY
    26487 00 052A   0433 G 20050401183618200 17 15 0752129+052921 39  +120 05
    INTELSAT 603 GEOSTATIONARY
    20527 90 021A   0433 G 20050401184558200 17 15 0547025+053053 39  +127 05
    INSAT 2B GEOSTATIONARY
    22724 93 048B   0433 G 20050401184702000 17 15 0552235+060846 39  +115 05
    INTELSAT 901 GEOSTATIONARY
    26824 01 024A   0433 G 20050401190715800 17 15 0617034+051829 39  +125 05
    GALAXY 5 GEOSTATIONARY
    21906 92 013A   0433 G 20050401195147000 17 15 0720205+052240 39  +125 05
    SL-16 R/B(1) OBSERVED AT RANGE 25340 KILOMETRES
    25662 99 014B   0433 G 20050401200127400 17 15 0755448+085420 39 R+105 05
    ATLAS 2AS CENTAUR OBSERVED AT RANGE 36033 KILOMETRES
    28155 04 003B   0433 G 20050401200826000 17 15 0737245+014720 39  +100 05
    EXPRESS 3A GEOSTATIONARY
    26378 00 031A   0433 G 20050401201408000 17 15 0755031+052037 39  +100 05
    SL-16 R/B(1) OBSERVED AT RANGE 27680 KILOMETRES
    25662 99 014B   0433 G 20050401201950200 17 15 0815483+080620 39  +100 05
    TELECOM 2D GEOSTATIONARY
    24209 96 044B   0433 G 20050401203801200 17 15 0832588+052046 39  +090 05
    ATLANTIC BIRD 2 GEOSTATIONARY
    26927 01 042A   0433 G 20050401203801200 17 15 0832069+052425 39  +100 05
    NILESAT 102 GEOSTATIONARY
    26470 00 046B   0433 G 20050401203801200 17 15 0837066+052205 39  +110 05
    NILESAT GEOSTATIONARY
    25311 98 024A   0433 G 20050401203801200 17 15 0837002+052614 39  +110 05
    
    Notes:
    ~~~~~~
    (1) Willie Koorts has added another option to his CoSaTrak computer
        program which allows one to do "box" searches. One enters the start
        and end azimuths, as well as minimum and maximum elevations, the
        stepping size ( in my case 1.5 degrees), and the time the mount spends
        "staring" at each setting ( in my case a minimum of 90 seconds ). In
        this way one is able to set up the system at the start of the evening
        and leave it unattended for (say) 4 hours whilst it scans the box
        defined. The problem still remains that later I have to go through
        the DVD recording and examine each "stared" location :-))
    
    (2) Consequently I have started to scan the Clarke belt (plus a few degrees
        either side) looking for known and unknown geostationary satellites and
        anything else that passes through the field of view. For geo and high
        altitude satellites the system can see satellites down to about 13th
        magnitude, but for leo satellites the limit is only about magnitude +8.
    
    (3) I am a little disappointed at how few objects were located so its
        apparent I will have to redo my scans with a more sensitive telescope
        which means a smaller field of view, which then means a lot more work..
    
    (4) #25662,#28155 and #25662 are objects in very elliptical orbits - seen
        by accident
    
    (5) I hope to report the scans done on the 2 April tomorrow - 25 satellites
        so far and one, as yet, unknown medium altitude satellite.
    
    Cheers
    Greg
    
    
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