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Registration Number

0223U000953, 0122U001481 , R & D reports

Title

The origin and relationships of families and resonant groups of asteroids according to observations and numerical simulations

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Head

Shevchenko Vasyl Н., Доктор фізико-математичних наук

Registration Date

22-01-2023

Organization

V.N. Karazin Kharkiv National University

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 Within the framework of the BinAstPhotSurvey program, photometric observations of representatives of the Flora family were carried out for the first time, among which a new binary system was discovered - (5121) Numazawa. The phase dependence of brightness of the asteroid (2582) Harsmaya-Bashi, which is near the 2:1 resonance, was obtained, and it was found that it can be attributed to M-type asteroids based on the shape and parameters of the phase dependence. Based on the new SDSS asteroid brightness catalog and WISE albedo measurements, the distribution of large main belt asteroid families (with more than 100 members) by mineralogical surface type was obtained. Among such asteroid families, approximately 70% are homogeneous in optical properties; about a third have a heterogeneous taxonomic composition. Among heterogeneous families, a significant share of asteroids (10-30%) belong to primitive taxonomic types with low albedo. A method of obtaining phase dependences of brightness on a linear section is proposed, using data from the GAIA spacecraft, estimates of phase coefficients for 26 asteroids are obtained. According to the results of a comparative analysis of the absolute magnitudes of asteroids of the Kharkiv database with the ATLAS survey, systematic deviations and linear trends were found for two photometric bands, indicating the growth of the deviations between the databases with an increase in the magnitude of asteroids. The Kharkiv database of absolute magnitudes of asteroids is located in the Strasbourg International Data Base CDS.

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Dovhopol Anatolii M.
Krugly Yurij M.
Lupishko Dmytro F.
Mikhalchenko Olga I.
Slyusarev Ivan H
Chiorny Vasyl G.