Search academic texts

Information × Registration Number 0210U001461, 0107U000675 , R & D reports Title Physical properties of asteroids, Kuiper belt bodies and comets based on photometry and polarimetry. popup.stage_title Head Lupishko Dmitro, Registration Date 17-02-2010 Organization Kharkov National University named after V.N. Karazin popup.description2 During 187 nights the photometric observations of 44 main-belt asteroids, 21 near-Earth asteroids (NEAs), 7 Hilda group asteroids, and photometric and polarimetric observations of 7 comets were carried out. The lightcurves and magnitudes of all these asteroids have been obtained; the compositional types and rotation periods of 32, BVRI-color indexes for 11 and diameters for 15 of them have been determined; the productivities of gas and dust of hyperactive comet 17Р/Holmes have been calculated. The influence of YORP-effect on axis rotation of NEAs have been established from photometric observations for the first time, what has fundamental importance for understanding of evolution of small asteroid axis rotation. Using one of the biggest telescopes in the world (8.2 m, ESO, Chile) the photometric and polarimetric observations of Kuiper-object 136199 Eris, of five transneptunian objects and of three centaurs were carried out together with colleagues of Paris Observatory. Two groups of transneptunian objects with different optical properties of their surfaces were revealed. An inherent difference between microstructure of these bodies and minor bodies of internal Solar system have been showed for the first time. Atypical spectral gradient of polarization was observed for the first time for some comets in the processes of their disintegration, explosion-like activity and in other catastrophic processes in their nuclei. The obtained results are of great interest from the point of view of both fundamental science and the asteroid-comet hazard problem. The lightcurves and parameters of polarization obtained in this Project are included to the international databases "Asteroid Photometric Catalogue" and "Planetary Data System". Product Description popup.authors Бельська І. Величко С. Величко Ф. Круглий Ю. Лупішко Д. Рихтегар А. Терещенко І. Чорний В. Шевченко В. popup.nrat_date 2020-04-02 Close