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Transcript
First results of observations with 80-cm telescope at peak Terskol, North Caucasus Viktor Voropaev, Igor Molotov Roscosmos delegation KIAM RAS IADC 35th Darmstadt, Germany ― WG1 April 24 – 26, 2017 Terskol observatory • Peak Terskol Observatory is situated at altitude of 3100 m in North Caucasus on the Elbrus mountainside Map of observatories that send the data to KIAM 80-cm Cassegrain telescope K-800 • It was installed in the 70-ies and working about 10 years. Then it was stopped and dismantled (secondary mirror was lost • Telescope was upgraded by setting up the lens corrector for improving and enlarging of FOV and motors with controller for automation of operations Setting up of lens corrector, CCD camera FLI PL09000 (3k x 3k, 12 µm) and Atlas focuser Updated K-800: FOV=55 x 55 minutes Observation statistics (telescope is exploited with expeditions) Data from telescope are used to calibrate the space debris population SDPA model Histogram of GEO SO magnitude in experimental measurements Histogram of object size estimations Future update of K-800 telescope • Re-aluminization of the main mirror to improve limiting magnitude • Installation of new 2k x 2k CCD camera FLI PL4301E having 24µm pixels to enlarge FOV • Installation UBVRI filter wheel to start photometry observations • Control system renewal and stepper motors replacement by DC motors with encoders to improve the throughput of telescope • To change CHAOS control software on FORTE to increase stability of operations Conclusion • ISON project is replenished with new respectively large telescope situated at 3100 m altitude in place with good quality of atmosphere • This is very powerful instrument for faint space debris observations • Now this is most large telescope that can spent 100% observation time for the project goals • Limiting magnitude is down to 18.5 now. It is expected that it will be improved down to 19.5 after realuminization of the main mirror • Current FOV is 55 x 55 minutes. It is expected that this will be enlarged to 75 x 75 minutes with new CCD camera • Obtained measurements are used to calibrate the space debris population SDPA model
