Optical 28 Sept 2009

From: Greg Roberts (grr@telkomsa.net)
Date: Tue Sep 29 2009 - 09:08:58 UTC

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     Observations 28 SEPT 2009
     ----------------------------
    
     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.
    
     Meade DSI Pro II Monochrome CCD camera without filters.
     using integration times of 5 sec min to 25 seconds maximum
     depending on brightness of sky in particular area.No image
     processing done, but some done automatically in the auto reduction
     software.
    
     Used with 4 inch SKYWATCHER refractor- model 1025 - fitted with home
     made focal reducer to give an f/2.56 system. Image scale is 6.56 arc
     sec/pixel and field of view 84.8 x 63.2 arc minutes. Shows 15th
     magnitude stars in real time with reasonably good conditions.
    
     Video set up used for the STSS DEMO objects #35937 and #35938.
    
     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:
     ==================
     35937 09 052A   0433 G 20090928180612000 56 15 1559355+022204 39  +000 05
     35937 09 052A   0433 G 20090928180640800 56 15 1603195-010819 39  +000 05
     35937 09 052A   0433 G 20090928180658800 56 15 1605407-033046 39  +000 05
     35937 09 052A   0433 G 20090928180731800 56 15 1610082-081509 39  +000 05
     35937 09 052A   0433 G 20090928180811300 56 15 1615499-143524 39  +000 05
     35937 09 052A   0433 G 20090928180841300 56 15 1620284-195902 39  +000 05
     35937 09 052A   0433 G 20090928180913300 56 15 1625528-261347 39  +000 05
     35937 09 052A   0433 G 20090928180952800 56 15 1633324-344214 39  +000 05
     35937 09 052A   0433 G 20090928181026600 56 15 1641030-422557 39  +000 05
     35937 09 052A   0433 G 20090928181100500 56 15 1650283-502517 39  +000 05
     35937 09 052A   0433 G 20090928181113600 56 15 1654526-533321 39  +000 05
     35937 09 052A   0433 G 20090928200456100 56 15 1520284-272358 39  +000 05
     35937 09 052A   0433 G 20090928200524900 56 15 1518146-301850 39  +000 05
     35937 09 052A   0433 G 20090928200550500 56 15 1515492-325808 39  +000 05
     35937 09 052A   0433 G 20090928201216900 56 15 1115412-712516 39  +000 05
     35937 09 052A   0433 G 20090928201243200 56 15 1032539-713531 39  +000 05
     35937 09 052A   0433 G 20090928201309500 56 15 0951550-710640 39  +000 05
     35937 09 052A   0433 G 20090928201347300 56 15 0901027-692738 39  +000 05
     35938 09 052B   0433 G 20090928181308300 56 15 1643561-495407 39  +000 05
     35938 09 052B   0433 G 20090928181342100 56 15 1654439-575309 39  +000 05
     35938 09 052B   0433 G 20090928181417900 56 15 1710465-660403 39  +000 05
     35938 09 052B   0433 G 20090928181438600 56 15 1724354-703656 39  +000 05
     35938 09 052B   0433 G 20090928181506800 56 15 1754097-762140 39  +000 05
     35938 09 052B   0433 G 20090928181555700 56 15 2027427-840315 39  +000 05
     35938 09 052B   0433 G 20090928181642700 56 15 0132442-824740 39  +000 05
     35938 09 052B   0433 G 20090928181722100 56 15 0257170-775320 39  +000 05
     35938 09 052B   0433 G 20090928181816600 56 15 0338114-711218 39  +000 05
     35938 09 052B   0433 G 20090928181900800 56 15 0354260-662417 39  +000 05
     35938 09 052B   0433 G 20090928181925400 56 15 0401041-635707 39  +000 05
     35938 09 052B   0433 G 20090928182018800 56 15 0411553-590830 39  +000 05
     35938 09 052B   0433 G 20090928201511200 56 15 1015083-711747 39  +000 05
     35938 09 052B   0433 G 20090928201520900 56 15 1000091-710435 39  +000 05
     35938 09 052B   0433 G 20090928201540900 56 15 0931489-702441 39  +000 05
    
    
      33490 09 001A   0433 G 20090928172737000 16 15 2107401+034536 28  +083 01
     33490 09 001A   0433 G 20090928172926000 16 15 2109269+034650 28  +082 00
     33490 09 001A   0433 G 20090928173051000 16 15 2110525+034749 38  +082 01
     34713 09 017A   0433 G 20090928174854000 16 15 2242016+050825 28  +116 02
     34713 09 017A   0433 G 20090928175101000 16 15 2244091+050824 28  +116 02
     34713 09 017A   0433 G 20090928175217000 16 15 2245260+050823 28  +116 01
     35815 09 047A   0433 G 20090928173625000 16 15 2033255+052559 18  +131 02
     35815 09 047A   0433 G 20090928173827000 16 15 2035275+052600 28  +131 01
     35815 09 047A   0433 G 20090928174020000 16 15 2037209+052600 18  +130 01
     27691 03 008A   0433 E 20090928174854000 16 15 2238513+051122 28  +124 04
     27691 03 008A   0433 E 20090928175101000 16 15 2240583+051119 28  +127 05
     27691 03 008A   0433 E 20090928175217000 16 15 2242152+051118 28  +124 01
    
     Strays seen:
     =================
     THURAYA 2
     27825 03 026A   0433 E 20090928172737000 16 15 2108054+034042 28  +114 03
     27825 03 026A   0433 E 20090928173051000 16 15 2111182+034253 38  +107 01
     INTELSAT 904
     27380 02 007A   0433 E 20090928174854000 16 15 2239587+051348 28  +121 03
     27380 02 007A   0433 E 20090928175217000 16 15 2243230+051348 28  +119 03
    
     Notes:
     =========
     (1) Prime intention of the tracking session was to tie down the orbits of
        the two payloads from the recent STSS DEMO mission. This was achieved.
    
     (2) The successful acquisition of the STSS DEMO payloads was a
      co-operative effort involving radio and optical tracking. Thanks are
      due to Ted for his prelaunch elements which were pretty good, but due
      to a bad weather spell over my location - apparently the only regular
      observer where optical observations could be made - the amateur
      network had to rely on radio doppler tracking to keep tabs of where
      the objects were under optical tracking was possible.
    
      The people involved here were Paul Marsh, Lyn Kennedy, Bob Christy,
       Sven Grahn and myself. Without the radio assistance the task would
       have been a bit more difficult. Thanks also to Ted and Mike for
       the elements updates from the radio, then optical observations.
    
     (3)IGNORE the magnitude values in the reports for the STSS DEMO objects.
      The leader (#35937) is about 1 to 1.5 magnitudes brighter than the trailer
      (#35938) which is about mag +8 on a high elevation pass.  The time
      difference between the two during this observing session was about 127
      seconds, increasing by approximately 39 seconds per day.
    
      Cheers
     Greg
    
    
    
     
    
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