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Spin-orbit coupling in binary asteroids

Published online by Cambridge University Press:  01 March 2016

Jean-Luc Margot  and
Shantanu P. Naidu
Jean-Luc Margot
Affiliation:
University of California, Los Angeles, 595 Charles Young Drive East, Los Angeles, CA 90095, USA email: jlm@astro.ucla.edu
Shantanu P. Naidu
Affiliation:
Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA email: shantanu.p.naidu@jpl.nasa.gov
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Abstract

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We use radar images with decameter resolution to measure the sizes, shapes, spin states, mutual orbits, masses, and densities of components of asteroid binaries and triples. We simulate the spin-orbit dynamics of these systems and map the possible spin configurations of the satellites on surface of section plots. The presence of chaotic regions in the phase space has important consequences for the evolution of binary asteroids. It may substantially increase spin synchronization timescales, delay BYORP-type evolution, and extend the lifetime of binaries.

Keywords

minor planetsasteroidssolar system: generalplanets and satellites: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 66 - 68
Copyright
Copyright © International Astronomical Union 2016 

References

Margot, J. L., Nolan, M. C., Benner, L. A. M., Ostro, S. J., Jurgens, R. F., Giorgini, J. D., Slade, M. A., & Campbell, D. B. 2002, Science, 296, 1445CrossRefGoogle Scholar
Margot, J. L., Pravec, P., Taylor, P., Carry, B., & Jacobson, S. 2015, in Asteroids IV, arXiv:1504.00034Google Scholar
Naidu, S. P. & Margot, J. L. 2015, The Astronomical Journal, 149, 80CrossRefGoogle Scholar
Naidu, S. P., Margot, J. L., Taylor, P. A., Nolan, M. C., Busch, M. W., Benner, L. A. M., Brozovic, M., Giorgini, J. D., Jao, J. S., & Magri, C. 2015, The Astronomical Journal, 150, 54Google Scholar