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Information × Registration Number 0218U001471, 0116U000832 , R & D reports Title Photometric and polarymetric investigations of the main belt asteroids, comets and transneptunien objects popup.stage_title Head Dmytro Lupishko, Registration Date 19-04-2018 Organization Kharkov National University named after V.N. Karazin popup.description2 Over 108 nights, photometric observations of 20 asteroids of the main belt, five comets, one centaur and one Kuiper belt object - the dwarf planet 136472 Makemake were carried out. Within the framework of the International BinAstPhotSurvey program, 15 double and four triple systems have been identified among small asteroids of the main belt, 18 of them are asynchronous systems and one is fully synchronous. The main parameters of these systems are calculated. Their analysis points to the main role of the YORP-effect in the origin of multiple systems among small asteroids. The rate of rotation of 76 small asteroids of the main belt are calculated and analyzed, and their tendency towards the critical velocity = 11 rev/day is indicated. Analysis of studies of long-period comets and comets of the Jupiter family showed that at equal heliocentric distances, the gas and dust productivity of the long-period comets examined is higher than that of the comets of the Jupiter family. This can be explained by the age-related exhaustion or by differences in the origin of these comets, different in type. The lower activity of "old" comets can be associated with the consequent loss of volatile substances and the creation of dust mantles on surfaces, as a result of previous perihelion passages. In the framework of international cooperation, photometric observations of the dwarf planet Makemake were carried out and the period of axial rotation P = 22.82658 ± 0.00005 hrs and the amplitude of the lightcurve A=0.03±0.005m determined. The previously stated assumption of the lightcurve with two pairs of extrema due to the shape of the object was confirmed. The obtained results are of considerable interest from the point of view of both fundamental science and applied problems "Asteroid-comet danger" and "Asteroids - sources of raw materials in near-Earth space". The obtained lightcurves, rotation parameters and other data are included in the international databases "Asteroid Photometric Catalog", "Planetary Data System", etc. Product Description popup.authors І. Г. Слюсарев І. М. Бельська В. Г. Чорний В. Г. Шевченко Д. Ф. Лупішко О. І. Міхальченко С. Ф.Величко Т. А. Громакіна Ю. М. Круглий popup.nrat_date 2020-04-02 Close