Optical 25 Jan 2009-part 2(last)

From: Greg Roberts (grr@telkomsa.net)
Date: Mon Jan 26 2009 - 14:21:44 UTC

  • Next message: Russell Eberst: "2009JAN25-26.OBS"

    Observations 25 Jan 2009 Part 2- last
    --------------------------------------------
    
    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) 145mm focal length f/2.5 lens fitted to 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.
    Image integrated for 2.56 seconds but exposure depends on sky background
    brightness. Field of view 2.5 x 1.9 degrees and showing about mag +12
    stars in "real time". Used as a finder for the 6 inch reflector.
    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.
    Used with 6 inch f/5 CELESTRON reflector modified to f/2.7 with home
    made corrector lens.Field of view 55 by 40 arc minutes and showing
    15th magnitude stars in real time.
    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:
    -----------------------
    
    90030 05 544A   0433 P 20090125203031000 56 15 0244099+053107 39  +105 05
    90030 05 544A   0433 P 20090125203415000 56 15 0247449+053942 39  +105 05
    90074 06 585B   0433 P 20090125202550000 56 15 0715125+211109 39  +115 05
    90074 06 585B   0433 P 20090125203951000 56 15 0718402+210436 39  +115 05
    23223 94 054A   0433 P 20090125202452000 56 15 0237360+025758 39  +090 05
    23223 94 054A   0433 P 20090125202836000 56 15 0241188+030307 39  +090 05
    23855 96 026A   0433 P 20090125201903000 56 15 0510509+130337 39  +085 05
    23855 96 026A   0433 P 20090125202140000 56 15 0513230+130622 39  +085 05
    22988 94 009A   0433 P 20090125204442000 56 15 0202373-012633 39  +102 05
    22988 94 009A   0433 P 20090125204827000 56 15 0207244-012656 39  +102 05
    27168 02 001A   0433 P 20090125201414000 56 15 0641060+074447 39  +085 05
    27168 02 001A   0433 P 20090125201615000 56 15 0643062+074532 39  +085 05
    27712 03 012B   0433 P 20090125205100000 56 15 0418130+062508 39  +085 05
    27712 03 012B   0433 P 20090125205502000 56 15 0423146+062801 39  +085 05
    
    Strays seen:
    ---------------
    NSS703 geostationary
    23305 94 064A   0433 P 20090125190625000 56 15 0734395+051751 39  +105 05
    EXPRESS AM1 geostationary
    28463 04 043A   0433 P 20090125185215000 56 15 0604358+052520 39  +100 05
    COSMOS 1743  steady
    16719 86 034A   0433 P 20090125191744200 56 15 0748523+043058 39  +010 05
    SL-8 R/B steady
    10293 77 079J   0433 P 20090125192643300 56 15 0756528+042524 39  +060 05
    SL-8 R/B steady
    16728 86 037B   0433 P 20090125192925400 56 15 0758541+050405 39  +030 05
    OPS 1920 variable- nice flash
    02481 66 089A   0433 P 20090125192945200 56 15 0800358+050535 39  +050 05
    SL-8 R/B steady
    19827 89 017B   0433 P 20090125193608500 56 15 0805056+052945 39  +035 05
    DELTA 1 R/B
    10517 77 118B   0433 P 20090125200616000 56 15 0312315+073524 39  +045 05
    SL-8 R/B variable
    32284 07 053B   0433 P 20090125184359300 56 15 0150423+080613 39  +070 05
    
    
    Notes:
    -----------
    
    (1) This concludes all observations for 25 Jan 2009
    
    Cheers
    Greg
    
    
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