Optical 21 Dec 2008

From: Greg Roberts (grr@telkomsa.net)
Date: Tue Dec 23 2008 - 07:06:45 UTC

  • Next message: Alberto Rango: "4542 SATOBS 21- 22 DEC 2008."

    Observations 21 Dec 2008
    -------------------------------
    
    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:
    ===================
    23862 96 029D   0433 G 20081221185001400 56 15 0638540+055559 39  +045 05
    09415 76 091A   0433 G 20081221185053100 56 15 0645410-013142 39  +060 05
    09415 76 091A   0433 G 20081221185231500 56 15 0719070-230505 39  +050 05
    09415 76 091A   0433 G 20081221185341500 56 15 0759370-391114 39  +050 05
    09415 76 091A   0433 G 20081221185430000 56 15 0839520-484239 39  +050 05
    28384 04 034A   0433 G 20081221185700000 56 15 0133450+371918 39  +075 05
    28384 04 034A   0433 G 20081221185906000 56 15 0140221+384618 39  +080 05
    28384 04 034A   0433 G 20081221190308000 56 15 0151494+411355 39  +080 05
    28546 04 034A   0433 G 20081221194115000 56 15 0318584-032824 39  +090 05
    28546 04 034A   0433 G 20081221194719000 56 15 0333440-034912 39  +090 05
    32287 07 054A   0433 G 20081221211631000 56 15 0415282+064534 39  +110 05
    32287 07 054A   0433 G 20081221211908000 56 15 0418049+064255 39  +110 05
    27168 02 001A   0433 G 20081221193131000 56 15 0340100+060220 39  +085 05
    27168 02 001A   0433 G 20081221193513000 56 15 0343512+060440 39  +085 05
    96093 96 593A   0433 G 20081221212850000 56 15 0219110+163225 39  +125 05
    96093 96 593A   0433 G 20081221213136000 56 15 0221584+163440 39  +125 05
    96137 96 637A   0433 G 20081221213806000 56 15 0224303+170444 39  +135 05
    12046 80 087A   0433 G 20081221215631000 56 15 0327533+174350 39  +120 05
    12046 80 087A   0433 G 20081221220011000 56 15 0331339+175323 39  +120 05
    
    Strays seen:
    ================
    ATLAS CENTAUR ROCKET  variable mag +4 to +7
    12069 80 087B   0433 G 20081221183922300 56 15 0052490+245546 39  +040 05
    ATLAS CENTAUR ROCKET
    03598 68 110B   0433 G 20081221185029400 56 15 0649560-024531 39  +040 05
    CZ-4B R/B
    29093 06 015B   0433 G 20081221185341500 56 15 0802270-380933 39  +040 05
    SJ-6F steady
    33409 08 053B   0433 G 20081221185430000 56 15 0841060-500255 39  +030 05
    THOR ABLESTAR ROCKET variable
    00204 61 031C   0433 G 20081221185700000 56 15 0134470+363842 39  +065 05
    COSMOS 1151 steady
    11671 80 005A   0433 G 20081221191152000 56 15 0338290+052959 39  +020 05
    OPS 4682 DEBRI variable
    01316 65 027C   0433 G 20081221191556000 56 15 0338430+051112 39  +070 05
    01316 65 027C   0433 G 20081221191605200 56 15 0338570+030052 39  +070 05
    GLOBALSTAR M056
    25945 99 058C   0433 G 20081221191720600 56 15 0338050+051445 39  +050 05
    ATLAS CENTAUR 5 variable
    27853 03 033B   0433 G 20081221192922200 56 15 0338360+072645 39  +040 05
    COSMOS 1459
    14057 83 042A   0433 G 20081221193524000 56 15 0358590+045341 39  +075 05
    METEOR 2-18
    19851 89 018A   0433 G 20081221195141200 56 15 0828530-465858 39  +045 05
    GEO IK variable
    23411 94 078A   0433 G 20081221195225700 56 15 0837190-510740 39  +055 05
    COSMOS 2285 variable
    23189 94 045A   0433 G 20081221195419800 56 15 0818480-495939 39  +075 05
    DELTA 1 R/B variable
    07735 75 027B   0433 G 20081221195734800 56 15 0821520-490211 39  +065 05
    COSMOS 1249 variable
    12319 81 021A   0433 G 20081221200759000 56 15 0816480-592233 39  +060 05
    SL8 R/B
    08344 75 094B   0433 G 20081221200853700 57 15 0829140-574958 39  +045 05
    DELTA 1 R/B
    10704 78 026C   0433 G 20081221202402200 57 15 0700270-731837 39  +055 05
    THORAD AGENA B R/B
    02174 66 040B   0433 G 20081221204230500 57 15 1139420-490203 39  +060 05
    ARABSAT 2B geostationary
    24652 96 063A   0433 G 20081221193131000 57 15 0342448+052600 39  +115 05
    ARABSAT 3A geostationary
    25638 99 009A   0433 G 20081221193513000 57 15 0345226+051815 39  +115 05
    DIRECT TV2 geostationary
    23192 94 047A   0433 G 20081221211016000 57 15 0416037+044939 39  +110 05
    SICRAL 1 geostationary
    26694 01 005A   0433 G 20081221211016000 57 15 0416062+050852 39  +100 05
    EUTELSAT W2 geostationary
    25491 98 056A   0433 G 20081221211016000 57 15 0415420+053121 39  +105 05
    SIRIUS 2 geostationary
    25049 97 071A   0433 G 20081221190534000 57 15 0321227+052517 39  +115 05
    GORIZONT 26 geostationary
    22041 92 043A   0433 G 20081221190534000 57 15 0324019+061130 39  +110 05
    ARIANE 44P R/B geostationary
    25461 98 049B   0433 G 20081221190534000 57 15 0324591+060753 39  +090 05
    GALAXY 11 geostationary
    26038 99 071A   0433 G 20081221192122000 57 15 0343072+052541 39  +100 05
    INTELSAT 804 geostationary
    24846 97 031A   0433 G 20081221192122000 57 15 0343406+052838 39  +105 05
    EBIRD geostationary
    27948 03 043A   0433 G 20081221192122000 57 15 0344330+052851 39  +105 05
    
    Notes:
    --------
    
    (1) Geosat FO - I did a plane scan from -16 to +15 minutes on the orbit
        plane using the two cameras . With the wide angle lens I should have
        seen any leo satellite brighter than about +7 magnitude and with the
        narrow field the leo satellite magnitude limit is about 2 magnitudes
        fainter. The predicted magnitude was +5.9. No sign of GFO seen so its
    
        (a) either too faint due to attitude no longer under control,
        (b) its orbit is now considerably different from what it was before
            it failed
        (c) the satellite has been de-orbited.
    
    Cheers
    Greg
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Tue Dec 23 2008 - 07:07:41 UTC