Optical 27 Feb 2007

From: Greg Roberts (grr@telkomsa.net)
Date: Wed Feb 28 2007 - 07:53:58 EST

  • Next message: Kevin Fetter: "Re: Optical 27 Feb 2007"

    Observations 27 Feb 2007:
    -----------------------------------
    
    Cosatrak 2 (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 150mm aperture f/5 Celestron reflector on Vixen Super
    Polaris equatorial mount used in alt-azimuth configuration and fitted
    with stepper motors on azimuth and elevation axis. Integrating for
    96 frames which is equivalent to an exposure of 1.92 seconds per image.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    For CLASSIFIED.TLE:
    --------------------------------
    
    90013 03 564A   0433 F 20070227184121600 56 15 0819325+125501 39  +080 05
    90035 05 625A   0433 F 20070227184849100 56 15 0937427+052013 39  +120 05
    90038 05 638B   0433 F 20070227185607100 56 15 1034586+042902 39  +115 05
    27168 02 001A   0433 F 20070227193812000 56 15 0813360+065659 39  +087 05
    90055 96 750A   0433 F 20070227194025500 56 15 0758443+105847 39  +090 05
    90049 05 605C   0433 F 20070227200712900 56 15 0721332+024341 39  +115 05
    90048 05 605B   0433 F 20070227202825700 56 15 0701576+094958 39  +105 05
    90016 03 766A   0433 F 20070227211618400 56 15 0613412+125156 39  +095 05
    90041 05 775A   0433 F 20070227213907100 56 15 0551199+191209 39  +120 05
    
    
    Strays seen:
    -------------
    
    Intelsat 904 geostationary
    27380 02 007A   0433 F 20070227184849100 56 15 0938179+052016 39  +120 05
    Delta 1 debri
    10767 76 077BQ  0433 F 20070227184849100 56 15 0937436+051432 39  +120 05
    GSAT3 geostationary
    28417 04 036A   0433 F 20070227190551800 56 15 1055304+050555 39  +135 05
    Kalpana 1 geostationary
    27525 02 043A   0433 F 20070227190551800 56 15 1055496+050740 39  +120 05
    Insat 3C geostationary
    27298 02 002A   0433 F 20070227190707000 56 15 1057238+050930 39  +115 05
    
    
    "Old" unknown: (geostationary):
    ----------------------------------
    
    91096 07 056GEO 0433 F 20070227185134500 56 15 1003059+053855 39  +115 05
    
    
    New unknown - geostationary :
    ---------------------------------
    
    91097 07 058GEO 0433 F 20070227190544300 56 15 1054395+051247 39  +130 05
    91097 07 058GEO 0433 F 20070227190551800 56 15 1054464+051221 39  +130 05
    91097 07 058GEO 0433 F 20070227190707000 56 15 1056001+050745 39  +130 05
    91097 07 058GEO 0433 F 20070227215328200 56 15 1339419-035118 39  +125 05
    
    Notes:
    --------
    
    (1) FINALLY the 6 inch reflector is ready for routine geostationary
        satellite hunting. After six attempts over the past few months I
        have finally got it to the stage where it is quick, easy and accurate
        to use. A pipe was set up in concrete and specifically located so
        that I could get maximum coverage of the Clarke belt and the telescope
        sits on this. Apart from a few teething problems that are easy to fix,
        the mounting sets accurate enough to locate a specific object.
    
    (2) I "lost"a few geostationaries - ie they were observed but cannot
        identify the field of view due to a teething problem - the azimuth
        display was loosing counts with the result that the displayed azimuth
        was incorrect. This is simple to fix .
    
    (3) #90041 - previously a difficult customer,is now easy- magnitude
        variation about +12 to +14
    
    (4) I still want to add a video camera finder to the system so that I
        can recognize star fields when I observe. Im currently using
        HEAVENSAT to locate geostationaries but since it only shows stars
        down to mag +12 I need a deeper display down to at least
        magnitude +14 in order to identify stars in the small field of
        view. With the video finder I can use the bigger field to see the
        brighter stars.
    
    (5) The new system is faster than what I previously used as I had to
        sometimes do long integrations to see the fainter geostationaries.
        Even when observing close to the near full moon I could see stars/
        geostationaries as faint as magnitude +14. With no moon I expect to
        see a further two magnitudes fainter.
    
    (6) Overall I am now a satisifed man - Ive extended my capabilities by
        several magnitudes and plan to do a lot of geostationary/high
        altitude hunting as this is virtually virgin territory and Im sure
        there is a lot out there.
    
    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 : Wed Feb 28 2007 - 07:55:56 EST