Перегляд за Автор "Kashuba, S. G."

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  • Ескіз
    Документ
    A new 800 mm automatic telescope
    (Astroprint, 2013) Andrievsky, Serhii M.; Molotov, I. E.; Fashchevsky, N. N.; Podlesnyak, S. V.; Zhukov, V. V.; Kouprianov, V. V.; Kashuba, S. G.; Kashuba, V. I.; Mel’nichenko, V. F.; Gorbanev, Juri M.; Андрієвський, Сергій Михайлович; Андриевский, Сергей Михайлович
    ABSTRACT. A new automatic telescope, a 800-millimeter main mirror catadioptric anastigmatic aplanat, was constructed by specialists of Odessa National University Astronomical observatory (Ukraine) in cooperation with their colleagues from the ISON project (Russia), and was recently put into operation. The telescope is mounted at Mayaki station in suburb of Odessa. It is equipped with a focal corrector and a professional CCD camera. The telescope is used now for observations of geostationary objects, asteroids, and comets. In addition, this telescope can be used for the high precision photometric observations of faint objects up to 20m.
  • Ескіз
    Документ
    Method for evaluating the astrometric and photometric characteristics of commercial scanners in their application for the scientific purpose
    (Astroprint, 2014) Protsyuk, Yu. I.; Andruk, V. N.; Muminov, M. M.; Yuldoshev, Q. X.; Ehgamberdiev, Sh. A.; Eglitis, I.; Eglite, M.; Kovylianska, O. E.; Golovnya, V. V.; Kazantseva, L. V.; Kashuba, S. G.
    Method for estimating the accuracy of astrometric (rectangular coordinates) and photometric (diameters and magnitudes) characteristics of commercial scanners is proposed and applied. The method is demonstrated using an example of processing of sequential scans of plates, which were exposed with different telescopes and then digitized with resolution of 1200 dpi with several Epson scanners. Scanning operations were carried out in various observatories as part of development of the database of photographic observations for Virtual Observatories (Vavilova, 2012). Errors of studied scanners are equal to σx, y = ± 0.02-0.06px and σm = ± 0.015-0.024 mag for astrometry and photometry, respectively.
  • Ескіз
    Документ
    Specific features of structures in the inner coma of comet C/2017 T2 (panstarrs) as observed with the OMT-800 telescope of the Odessa Observatory telescope network
    (Одеський національний університет імені І. І. Мечникова, 2020) Kleshchonok, V. V.; Kashuba, S. G.; Andrievsky, S. M.; Gorbanev, Yu. M.
    Observations of the comet were carried out using the OMT-800 telescope (the primary mirror diameter D = 80 cm; the focal length F = 214 cm) of the Odessa Observatory telescope network from January to June 2020. Image processing was performed through standard methods using subtraction of dark and flat field frames. The resulting frames were employed to analyse the morphology of the cometary inner coma using digital filters. Isophotes of the coma and images of its structures appearing as fans and jets were obtained. The presence of a strong fan, which distorts the coma’s standard appearance and makes it elongated perpendicularly to the Sun-comet line, is observed over the period from January to April. Later on, a weak jet that hardly affects the coma’s standard shape appears to replace the fan. The jet reaches its peak intensity near perihelion and then gets fainter rapidly. Such behaviour of the coma structures is indicative of the presence of two active areas on the cometary nucleus surface, for which the matter outflow is governed by the Sun illumination conditions. One of these areas, being more active, is responsible for the appearance of a strong fan. The other area, which is far less active, generates a jet that manifests itself near perihelion. The peak dust production of the comet 120-150 days before perihelion is due to the presence of an active fan in the inner coma.
  • Ескіз
    Документ
    THE QUANTITY AND QUALITY OF OBSERVATIONAL NIGHTS MONITORED WITH USING THE ASTRONOMICAL INSTRUMENTS AT THE SUBURBAN OBSERVATION STATIONS OF ASTRONOMICAL OBSERVATORY OF ODESSA NATIONAL UNIVERSITY
    (Astroprint, 2015) Kashuba, S. G.; Gorbanev, Juri M.; Andrievsky, Serhii M.; Marsakova, V. I.; Troianskyi, V. V.; Андрієвський, Сергій Михайлович; Андриевский, Сергей Михайлович
    The Astronomical Observatory of Odessa National University named after I.I. Mechnikov is one of the four astronomical observatories which exist in classical universities. The Observatory has a main office in the T.G. Shevchenko Park that located near historical center of Odessa. The Observatory also has several observation stations: in the Odessa suburb Mayaki and Kryzhanovka villages.