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YORP: Influence on Rotation Rate

A. A. Golubov, Yu. N. Krugly

Protecting the Earth against Collisions with Asteroids and Comet Nuclei, In: A. M. Finkelstein, W. F. Huebner, V. A. Shor (Eds) Proceedings of the International Conference “Asteroid-Comet Hazard-2009”, StP: Nauka, 90–94 (2010)

Ключевые слова: Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), near-Earth asteroids (NEAs), rotation rate, calculating angular acceleration of asteroids, Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, elliptic orbits, thermal inertia of the asteroid's surface, the asteroid 1620 Geographos

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We have developed a semi-analytical model for calculating angular acceleration of asteroids due to YarkovskyO'KeefeRadzievskii Paddack (YORP) effect. The calculation of the YORP effect has been generalized for the case of elliptic orbits. It has been shown that the acceleration does not depend on thermal inertia of the asteroid's surface. The model was applied to the asteroid 1620 Geographos and led to acceleration 2 10 s. This value is close to the acceleration obtained from photometric observations of Geographos by Durech et al. [1]