Zero secular torque on asteroids from impinging solar photons in the YORP effect: A simple proof |
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| Authors: | David Parry Rubincam Stephen J. Paddack |
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| Affiliation: | a Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
b Aerospace Engineering Department, U.S. Naval Academy, 590 Holloway Road, Annapolis, MD 21402-5042, USA |
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| Abstract: | YORP torques, where “YORP” stands for “Yarokovsky-O’Keefe-Radzievskii-Paddack,” arise mainly from sunlight reflected off a Solar System object and the infrared radiation emitted by it. We show here, through the most elementary demonstration that we can devise, that secular torques from impinging solar photons are generally negligible and thus cause little secular evolution of an asteroid’s obliquity or spin rate. |
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| Keywords: | Asteroids Asteroids, Rotation Asteroids, Dynamics Rotational dynamics Celestial mechanics |
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