V. Agapov, D. Zelenov 35th IADC meeting Darmstadt, 24-26 April 2017 Results of observations of space debris at high near-Earth orbits with electro-optical sensors of ASPOS OKP system in 2016 V. Agapov, D. Zelenov 35th IADC meeting Darmstadt, 24-26 April 2017

Operational network of optical facilities of ASPOS OKP (KSOES) Experimental optical facility (EOP) of the first type Experimental optical facility (EOP) of the second type EOP-1-1 EOP-1-3 EOP-2-1 EOP-2-2 EOP-1-2 EOP-1-4 Electro-optical instrument with aperture 65 cm (OES65) Electro-optical instrument with aperture 50 cm (OES50) Electro-optical instrument with aperture 25 cm (RKS) Experimental optical facilities’ design is based on modular approach providing for possibility of adding new optical sensors, increasing computing power as well as relocation to a new place.

Operational network of optical facilities of ASPOS OKP EOP-1 (4 facilities) Each facility includes 2 telescopes with 19 cm aperture 1 telescope with 25 cm aperture 1 telescope with 40 cm aperture EOP-2 (2 facilities) 4 telescopes with 19 cm aperture 1 telescope with 65 cm aperture OES-65 RKS-25 OES-50 Total: 21 instruments

Experimental optical facility (EOP) of the first type

Experimental optical facility (EOP) of the second type

Key characteristics of telescopes Telescope 19 cm Telescope 25 cm Aperture, mm 190 250 Effective focal length, mm 296 625 FOV angular diameter, deg 10 4.8 FOV linear size, мм 52 Quality of imaging Diffraction-limited Sensitivity at 5 s exposure time for GEO angular rates and S/N=3, mag +14,7m +16,1m

Key characteristics of telescopes Telescope 40 cm Telescope 50 cm Aperture, mm 400 500 Effective focal length, mm 920 1600 FOV angular diameter, deg 3.2 1,9 FOV linear size, мм 52 Quality of imaging Diffraction-limited Sensitivity at 5 s exposure time for GEO angular rates and S/N=3, mag +18,0m +17,4m

Key characteristics of telescopes Telescope 65 cm Aperture, mm 650 Effective focal length, mm 1300 FOV angular diameter, deg 3,8 FOV linear size, мм 86 Quality of images Diffraction-limited Sensitivity at 5 s exposure time for GEO angular rates and S/N=3, mag +18,6m

View of telescopes 25 cm telescope 4 х 19cm telescope 40cm telescope

Number of high orbit objects observed by individual ASPOS OKP optical facilities in 2016

Cumulative GEO and HEO objects discovery statistics (ASPOS OKP and ISON) Optical facilities of ASPOS OKP have collected more than 8 millions of measurements in 2016 for more than 3400 space objects at high orbits (GEO, MEO, HEO). Instruments of the network have discovered 530 new and re-discovered more than 410 lost GEO and HEO space debris objects during 2016. At present ASPOS OKP provides for more than 90% of discoveries of new objects at high orbits

Distribution of GEO objects: comparison for 01 Jan 2016 and 01 Jan 2017

Distribution of GEO fragments having AMR<0.5 sq.m/kg

Distribution of HEO and MEO objects: comparison for 01 Jan 2016 and 01 Jan 2017

Distribution of HEO and MEO objects: comparison for 01 Jan 2016 and 01 Jan 2017

New optical facility of ASPOS OKP in the Western hemisphere OEK OKM optical complex Brasil, Itajubá Official opening ceremony took place on Apr 5, 2017 Itajuba Observatório Pico dos Dias 22°32′04″S 45°34′57″W 1864 m

OEK OKM (Observatório Pico dos Dias, Itajubá) Key characteristics of telescopes Sova-75-O: Diameter – 750 mm Angular FOV – 7 deg Linear FOV – 170,0 mm Sova-25: Diameter – 250 mm Angular FOV – 10 deg Linear FOV – 72,3 mm Sova-5: Diameter – 50 mm Angular FOV – 40 deg

OEK OKM (Observatório Pico dos Dias, Itajubá) Name of unit Instantaneous FOV Average number of observed objects per night Minimal size of observed objects Astrometric accuracy Module of detection high-orbit objects (heights 3500 to 50000 km) 26 sq. deg 500 20-25 cm 0,5 arcsec Module of detection of LEO (heights 500 to 3500 km) 98 sq. deg 350 15-20 cm 3 arcsec Module of detection of LEO (heights 120 to 800 km) 1568 sq. deg 600 40-50 cm 10 arcsec

Thank you for your attention! Контакты Thank you for your attention! v.agapov@mcc.rsa.ru