Scheeres D J, Fahnestock E G, Ostro S J, Margot J-L, Benner L A M, Broschart S B, Bellerose J, Giorgini J D, Nolan M C, Magri C, Pravec P, Scheirich P, Rose R, Jurgens R F, De Jong E M, Suzuki S
Department of Aerospace Engineering, University of Michigan, 1320 Beal Avenue, Ann Arbor, MI 48109-2140, USA.
Science. 2006 Nov 24;314(5803):1280-3. doi: 10.1126/science.1133599. Epub 2006 Oct 12.
Dynamical simulations of the coupled rotational and orbital dynamics of binary near-Earth asteroid 66391 (1999 KW4) suggest that it is excited as a result of perturbations from the Sun during perihelion passages. Excitation of the mutual orbit will stimulate complex fluctuations in the orbit and rotation of both components, inducing the attitude of the smaller component to have large variation within some orbits and to hardly vary within others. The primary's proximity to its rotational stability limit suggests an origin from spin-up and disruption of a loosely bound precursor within the past million years.
对近地小行星66391（1999 KW4）的耦合旋转和轨道动力学进行的动力学模拟表明，在近日点通过期间，它因来自太阳的摄动而被激发。相互轨道的激发将刺激两个组成部分的轨道和旋转产生复杂的波动，导致较小组成部分的姿态在某些轨道内有很大变化，而在其他轨道内几乎不变。主星接近其旋转稳定极限表明它起源于过去一百万年中一个松散结合的前身的加速旋转和瓦解。
