YORP: Influence on Rotation Rate
A. A. Golubov1, Yu. N. Krugly2
1Astronomisches Rechen-Institut of University of Heidelberg, Heidelberg, Germany
2V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
Abstract:
We have developed a semi-analytical model for calculating
angular acceleration of asteroids due to Yarkovsky—O'Keefe—Radzievskii—
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 · 10-18 s-2.
This value is close to the acceleration obtained from photometric observations of Geographos by Durech et al. [1].
Key words:
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.