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Information × Registration Number 0225U002349, (0122U001481) , R & D reports Title The origin and relationships of families and resonant groups of asteroids according to observations and numerical simulations popup.stage_title Фізичні властивості астероїдів, що входять до сімейств та резонансних груп за даними спостережень та чисельного моделювання Head Shevchenko Vasyl Н., Доктор фізико-математичних наук Registration Date 05-03-2025 Organization V.N. Karazin Kharkiv National University popup.description1 The aim of the work is to collect and analyze observational data on physical and dynamical properties of asteroid families and resonant groups of the main belt, discover binary systems and determine their basic parameters using ground data and spacecraft data (WISE, Akari, Gaia). popup.description2  New observations of 10 asteroids were made and observations from previous years were processed for 53 asteroids belonging to different families and resonance groups. New values of rotation periods, absolute magnitudes and color indices were obtained. A new binary system (5121) Numazawa was discovered. The rotational properties of V-asteroids, the parent bodies of HED-meteorites, were analyzed for the first time. It was established that in selected regions in the space of proper orbital elements there is a different number of bodies with retrograde axial rotation. This fact is in extremely good agreement with numerical modeling of the migration paths of asteroids that left the Vesta family under the influence of the Yarkovsky- effect, confirms the small number of nonvestoids in the main belt and indicates the possible location of objects of a similar type in the asteroid belt. The YORP- effect on the state of rotation of asteroids (2100) Ra-Shalom and (138852) 2000 WN10 was first detected. Precession of the axis of rotation was also found in asteroid (2100) Ra-Shalom. This is the first detection of precession based on ground-based observations, and it corresponds to the theoretically expected value. The analysis of the physical homogeneity of 107 asteroid families was performed for the first time. It was found that approximately 70% of them are homogeneous, and approximately a third have a heterogeneous taxonomic composition. The analysis of the influence of space weathering processes on the spectral properties of asteroids belonging to the largest families was performed for the first time. It was shown that the slopes of their spectra change depending on the distance from the Sun, which confirms theoretical calculations and indicates the need to take such changes into account when estimating the age of families. The Kharkiv database of absolute magnitudes of asteroids has been created, which includes 430 asteroids with known compositional type, albedo, diameter Product Description popup.authors Dovhopol Anatolii M. Kruhlyi Yurii M. Lupishko Dmytro F. Mikhalchenko Olha I. Rychahova Valeriia V. Sliusarev Ivan H. Chornyi Vasyl H. popup.nrat_date 2025-03-05 Close