Volume 371, Number 1, May III 2001
|Page(s)||350 - 353|
|Section||Celestial mechanics and astrometry|
|Published online||15 May 2001|
The Yarkovsky thermal force on small asteroids and their fragments
Choosing the right albedo
Institute of Astronomy, Charles University, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
2 Southwest Research Institute, 1050 Walnut St, Suite 426, Boulder, CO 80302, USA e-mail: email@example.com
Corresponding author: D. Vokrouhlický, firstname.lastname@example.org
Accepted: 12 March 2001
Thermal (Yarkovsky) forces acting on small bodies in the solar system have been shown to play an important role in the the delivery of meteoroids and km-sized asteroids to Earth. So far, several aspects of the Yarkovsky force have been studied in some detail, including non-linear effects of the heat diffusion problem, non-sphericity and the layered-structure of the objects. In this paper, we address the concept of optical absorptivity. We find that the best formulation of the Yarkovsky effect uses the first two moment-integrals of an object's hemispheric albedo. A useful approximation of these albedo parameters is an object's Bond albedo.
Key words: celestial mechanics / minor planets, asteroids / meteoroids
© ESO, 2001
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