Observations 06 JULY 2011 ------------------------------- 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. Meade DSI Pro II Monochrome CCD camera without filters. using integration times of 05 sec min to 30 seconds maximum depending on brightness of sky in particular area.No image processing done but dark field applied. Used with 102mm aperture f/2.56 refractor ,field of view 84 x 63 arc minutes. 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 checked against GPS signal. Images processed and automatically reduced using APEX. Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg, Elevation 10 metres-situated in Pinelands (Cape Town),South Africa FOR CLASSIFIED.TLE: =========================== 04418 70 046A 0433 G 20110706174518000 16 15 1740109-031154 28 04418 70 046A 0433 G 20110706174715500 16 15 1742092-030913 97 04418 70 046A 0433 G 20110706174811500 16 15 1743063-030757 28 04418 70 046A 0433 G 20110706174847500 16 15 1743414-030706 28 06317 72 101A 0433 G 20110706202217500 16 15 1447551-155951 78 06317 72 101A 0433 G 20110706202352500 16 15 1450107-160335 19 06317 72 101A 0433 G 20110706202534000 16 15 1452268-160653 39 +120 05 06317 72 101A 0433 G 20110706202659500 16 15 1454285-160952 48 +125 05 06380 73 013A 0433 G 20110706175123000 16 15 1811523-051442 39 +110 05 06380 73 013A 0433 G 20110706175201500 16 15 1812318-051332 28 06380 73 013A 0433 G 20110706175235500 16 15 1813056-051241 28 06380 73 013A 0433 G 20110706175310500 16 15 1813409-051149 28 08482 75 118A 0433 G 20110706180855000 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Moon not a problem. (2) Could not find a few DSP satellites so will locate those by using the radio dish which enables position determination to within a degree or so and good enough for subsequent optical acquisition. The satellites are DSP F21 (last observed about 74 days ago) and DSP F22 last observed 186 days ago ( may have been moved?) (3) DSP F21r #26883 variable DSCS3-3 #16117 long period of invisibility so have to be patient only visible for about 5-10% of its cycle. MAGNUM 1R2 #15545 long period of invisibility so needs patience. (4) Still need to find following #22916 which is a DSCS rocket- last observed 92 days ago. MERCURY 2 #23855 last observed 186 days ago has moved and is currently lost to the amateur community. MAGNUM 2R #20357 last observed 93 days ago FLEETSATCOM 8 #20253 last observed 89 days ago DSP-F10R #13089 last observed 12 days ago DSCS3-12R #26577 last observed 169 days ago EKRAN 5 #11890 appears to be too faint for my 4 inch refractor - have seen it with the 6 inch reflector - last seen 100 days ago (6 inch mirror needs aluminizing so at the moment the 4 inch refractor probably out-performs the 6 inch) 96044 last seen 186 days ago - too faint for my system 96143 too faint for my system Most of these are to my west so poor phase angle for evening observing. Cheers Greg _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
This archive was generated by hypermail 2b29 : Fri Jul 08 2011 - 13:53:48 UTC