Optical 15 Dec 2008 Part 2

From: Greg Roberts (grr@telkomsa.net)
Date: Wed Dec 17 2008 - 13:19:21 UTC

  • Next message: Russell Eberst: "2008DEC16-17.OBS"

    Observations 15 Dec 2008 Part 2
    ---------------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    Camera mount now carries two systems that can be operated
    together as two totally different sytems and computers used.
    Generally the DSI Pro II camera will be used for high altitude
    slow moving objects. Tests seem to indicate that its sensitivity
    is comparable to the MINTRON ( possibly better) but as its not
    possible (?) to time stamp to better than 1 second accuracy the
    time resolution is not good enough for LEO objects.
    
    (1) 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 128 fields
    which is equivalent to a max exposure of 2.56 seconds maximum
    per image. Field of view 6.8 x 5.4 degrees.
    Individual frames are video time stamped with GPS derived signal.
    
    (2)Meade DSI Pro II Monochrome CCD camera without filters.
    using integration times of 20 sec min to 60 seconds maximum
    depending on brightness of sky in particular area.No image
    processing done but dark field applied.
    Used with 200mm focal length f/2.8 Nikkon telephoto lens,
    field of view 1.88 x 1.40 degrees. Can get to magnitude 13
    or so in less than 20 seconds exposure.
    Exposure time to nearest second inserted into image FITS header
    from PC clock which is automatically checked every minute against
    GPS signal.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
    Elevation 10 metres-situated in Pinelands (Cape Town),South Africa
    
    
    For CLASSFD.TLE:
    -----------------
    28384 04 034A   0433 G 20081215190755200 56 15 2354500+150251 39  +075 05
    28384 04 034A   0433 G 20081215190906600 56 15 0008230+175923 39  +075 05
    28384 04 034A   0433 G 20081215191206200 56 15 0035420+235433 39  +080 05
    28384 04 034A   0433 G 20081215191621100 56 15 0103090+295144 39  +085 05
    25724 99 023A   0433 G 20081215200342400 56 15 2258480+012936 39  +040 05
    25724 99 023A   0433 G 20081215200504400 56 15 2310050+000828 39  +055 05
    25724 99 023A   0433 G 20081215200750100 56 15 2333250-023729 39  +070 05
    90006 00 596A   0433 G 20081215202803700 56 15 1537300-773329 39  +070 05
    90006 00 596A   0433 G 20081215202938400 56 15 1200500-780502 39  +070 05
    90006 00 596A   0433 G 20081215203145900 56 15 0931490-663401 39  +070 05
    90006 00 596A   0433 G 20081215203332000 56 15 0854350-544525 39  +070 05
    19460 88 078A   0433 G 20081215203529900 56 15 0055460-134832 39  +040 05
    19460 88 078A   0433 G 20081215203602700 56 15 0039540-271601 39  +050 05
    19460 88 078A   0433 G 20081215203646200 56 15 0008480-445625 39  +055 05
    05682 71 110E   0433 G 20081215205426500 56 15 0642020-303751 39  +070 05
    05682 71 110E   0433 G 20081215205500100 56 15 0717170-384355 39  +075 05
    05682 71 110E   0433 G 20081215205523400 56 15 0743340-431854 39  +085 05
    90081 08 628A   0433 G 20081215211658000 56 15 2353390-063449 39  +075 05
    90081 08 628A   0433 G 20081215211901100 56 15 2355080-104726 39  +075 05
    90081 08 628A   0433 G 20081215212106800 56 15 2356290-154655 39  +070 05
    90081 08 628A   0433 G 20081215212322400 56 15 2357330-221139 39  +070 05
    05681 71 110D   0433 G 20081215212956700 56 15 0358180-544113 39  +060 05
    05681 71 110D   0433 G 20081215213020800 56 15 0424020-624212 39  +070 05
    05681 71 110D   0433 G 20081215213103300 56 15 0543310-734236 39  +070 05
    23851 96 024A   0433 G 20081215213931200 56 15 1311100-655135 39  +055 05
    23851 96 024A   0433 G 20081215214043800 56 15 1136000-693417 39  +050 05
    23851 96 024A   0433 G 20081215214252300 56 15 0709230-554845 39  +040 05
    
    Unknown 1:
    -------------
    91130 08 850LEO 0433 G 20081215192907800 56 15 0329260+033014 39  +035 05
    91130 08 850LEO 0433 G 20081215192921300 56 15 0338540+023154 39  +035 05
    91130 08 850LEO 0433 G 20081215192929100 56 15 0344200+015824 39  +035 05
    91130 08 850LEO 0433 G 20081215192941400 56 15 0352250+010839 39  +035 05
    
    Unknown 2:
    ---------------
    91131 08 850LEO 0433 G 20081215194725800 56 15 0333150+132630 39  +030 05
    91131 08 850LEO 0433 G 20081215194732200 56 15 0339460+133230 39  +030 05
    
    Strays seen:
    ---------------
    ATS 6 geostationary
    07318 74 039A   0433 G 20081215201916000 56 15 0132449+161015 39  +115 05
    ETS 6, flashing, range 15780 kms
    23230 94 056A   0433 G 20081215210756000 56 15 0126343+134007 39  +100 05
    COSMOS 2350 geostationary
    25315 98 025A   0433 G 20081215214709000 56 15 0847468+113628 39  +125 05
    ARIANE 5 DEB (SPELTRA) , range 12940 kms, variable
    27950 03 043D   0433 G 20081215215503000 56 15 0425076+070952 39  +100 05
    INTELSAT 904 geostationary near DSCS 3-13
    27380 02 007A   0433 G 20081215222741000 56 15 0827476+052042 39  +110 05
    AMC 14 geostationary-reported yesterday as UNKNOWN 91129
    32708 08 011A   0433 G 20081215222741000 56 15 0826457+045653 39  +100 05
    32708 08 011A   0433 G 20081215223606000 56 15 0835155+053014 39  +100 05
    32708 08 011A   0433 G 20081215223235000 56 15 0831424+051614 39  +100 05
    ARIANE 5 R/B  range 34330 kms
    32769 08 018C   0433 G 20081215222741000 56 15 0825062+054547 39  +105 05
    COSMOS 1299
    12783 81 081A   0433 G 20081215190135600 56 15 0122070+072918 39  +055 05
    DELTA 1 DEBRI variable
    04053 69 064C   0433 G 20081215191133400 56 15 0026530+220530 39  +045 05
    SL-8 R/B variable
    21797 91 081B   0433 G 20081215193432800 56 15 0032330+142628 39  +065 05
    IUS R/B(1)  steady
    19970 89 033C   0433 G 20081215193448400 56 15 0043270+171356 39  +040 05
    COSMOS 2389 steady
    27436 02 026A   0433 G 20081215193956000 56 15 0350540+015023 39  +045 05
    DELTA 1 R/B  steady
    20323 89 089B   0433 G 20081215200342400 56 15 2310550-001809 39  +030 05
    THORAD AGENA D steady
    04159 69 082AB  0433 G 20081215204037000 56 15 2224380-673559 39  +030 05
    GLOBALSTAR M045 variable
    25676 99 019A   0433 G 20081215204038200 56 15 2211040-661608 39  +070 05
    
    Notes:
    ------
    (1) Unknown 91129 identified as AMC 14 08011A #32708. It did NOT appear
        in the "SPACETRACK All" objects that I used but popped up in the next
        download, so BEWARE - the "SPACETRACK All Objects" does NOT contain
        all unclassified objects. Thanks to Scott Campbell for his "guess" at
        the orbit - pretty close!
    
    (2) Two other UNKNOWNS found that do NOT appear in the SPACETRACK
         ALL OBJECTS element database's that I checked.
    
        91130 appeared bright and steady and I get an orbit as follows
            inclination = 33.8 degrees, period 120.1 min, height 1690 kms,
            RA Node 175.2 degrees, standard magnitude 2.9
    
        91131 crossed corner of field so only two measures. Again bright
            and steady. Rough orbit gives
            inclination 26.3 degrees, period 107.4 min, height 1112 kms,
            RA Node 115.1 degrees, standard magnitude 3.1
    
        These assume a circular orbit. However since they are so bright and
        do not appear to be catalogued I suspect they are objects in a
        highly elliptical orbit with a low perigee causing a large error in
        prediction time ?
    
    (3) This concludes all objects observed 15 December,2008 apart from a
        few meteors. No aircraft or other UFO's this time.
    
    Cheers
    Greg
    
    
    
    
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