The interactive dynamics of a binary asteroid and ejecta after medium kinetic impact

Kinetic impacts on a binary asteroid will produce ejecta debris as well causing disturbance to the spin-orbit motion of components. Understanding complex interactions between and system can be crucial both theoretical study mission design. In this paper, we develop detailed model for dynamical evolution within system, in which combined various perturbations considered collisional process with asteroid. Taking an example scenario like DART impact, calculated fate from size 0.01 mm 10 m analyzed distribution their final deposition locations. The results show that diameter less than 0.1 escape quickly under influence solar radiation pressure, while larger survive longer, i.e., few cycles more 400 days. We coefficient restitution asteroid, found damped collisions would allow longer orbit. also studied effect tumbling rotation secondary surface secondary, suggest rotational state causes obvious changes Dimorphos’ slope, which, however, are not sufficient triggering landslides. addition, internal structure primary is studied, it has little but does affect primary. This due change relative acceleration primary, regions where remain.