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Документ Monitoring the artificial space objects with Ukrainian network of optical stations(Одеський національний університет імені І. І. Мечникова, 2021) Romanyuk, Ya. O.; Shulga, O. V.; Shakun, Leonid S.; Koshkin, Nikolay I.; Кошкін, Микола Іванович; Кошкин, Николай Иванович; Vovchyk, Ye. B.; Bilinsky, А. І.; Kozyryev, Y. S.; Kulichenko, M. O.; Kriuchkovsky, V. F.; Kashuba, V. I.; Korobeynikova, E. A.; Меlikyants, S. M.; Strakhova, S. L.; Теrpan, S. S.; Golubovskaya, T. A.; Martyniuk-Lototskiy, K. P.; Nogacz, R. T.; Epishev, V. P.; Kudak, V. I.; Neubauer, І. F.; Perig, V. М.; Prysiazhnyi, V. I.; Ozeryan, A. P.; Kozhukhov, O. M.; Kozhukhov, D. M.; Ivaschenko, Yu. M.The article describes the successes and challenges of the Ukrainian network of optical stations (UMOS) in recent years in the field of astrometric observations of artificial space objects both in low-Earth orbit (LEO) and geostationary Earth orbit (GEO). UMOS was established in 2012 as a joint partnership of organizations interested in satellite observations for scientific purposes and practical near Earth space monitoring. The main purpose of the UMOS has been (and still is) to combine scientific and technical means with regular optical (positional and / or non-positional) observation. The short list of equipment of the UMOS members are given in the tables. The programs for observations, used methods and obtained results are described in the paper. In conclusion, the advantages of observations of artificial space objects by means of a network are summarized. The experience of UMOS and main results obtained by UMOS can be considered as the first step to create the SSA system of UkraineДокумент New wide-field telescope with a mirror diameter of 600 mm for the telescope network of the Odessa Observatory(Одеський національний університет імені І. І. Мечникова, 2020) Fashchevsky, N. N.; Podlesnyak, S. V.; Bondarenko, Yu. N.; Andrievsky, S. M.; Romanyuk, Ya. O.Optical scheme of the new wide-field telescope of the telescope network of Odessa Observatory is described.The telescope optical layout is designed as a mirror-lens system with a Ross-type two-lens corrector and a hyperbolic primary mirror with diameter of 600 mm. The prime focus corrector is capable of imaging a field of 2 degrees, the rootmean-square radius of the diffraction spot is about 4.5 m, which is 2.5 times larger than that of the diffraction-limited spot (Airy disk).