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 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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