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| Paper: |
Study on Rotational Parameters for Asteroid 4179 Toutatis from Chang'e-2's Close Flyby |
| Volume: |
513, Serendipities in the Solar System and Beyond |
| Page: |
111 |
| Authors: |
Zhao, Y.; Ji, J. |
| Abstract: |
This paper shows a review of the determination of rotational parameters of Toutatis based on the observational results from Chang'e-2's close flyby in Dec 2012. We use the 3-D shape model derived from ground-based radar observations to determine the 3-1-3 Euler angles at the flyby epoch, which are evaluated to be –20.1°±1°, 27.6°±1° and 42.2°±1°. Spin and precession periods are evaluated to be 5.38±0.03 days and 7.40±0.03 days, respectively. The large value of tumbling angle (angle between angular momentum axis and spin axis) caused the significant amplitude of Toutatis' tumbling attitude observed from Earth. |
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