University of Tokyo
JAXA Space Exploration Center, Japan Aerospace Exploration Agency (JAXA)(JSPEC)
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
雑誌名
アストロダイナミクスシンポジウム講演後刷り集
雑誌名(英)
Proceedings of 18th workshop on JAXA Astrodynamics and flight mechanics
巻
2008
発行年
2009-03
会議概要（会議名, 開催地, 会期, 主催者等）（英）
Symposium on Flight Mechanics and Astrodynamics 2008 (July 28-29, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)), Sagamihara, Kanagawa Japan
The formation of rubble pile after a collision of two primary rubble piles is discussed, changing an initial collision velocity, its directions, and their initial radius. At initial, the two primary sub-kilometer rubble piles which have same mass and radius are collided with each other. Since rubble piles are shaped by the aggregation of many fragments affected by their gravity, the N-body simulation combining with the spring-dumper system is used to analyze the motion of each fragment. In this model, each fragment shall be a mass particle. All frictions which serve forces in the circumferential direction are neglected. Additionally, the analysis is done in 2-dimensional field. Any study conclusions is derived from comparisons of simulation data sets statistically. This analysis leads to the result that the initial collision velocity and its directions have an important role in the motion of particles. In the range from about 0.25 to 0.5 [m/sec] of the collision velocity, an intensive motion change occurs. On the other hand, changing the direction of the collision causes the result that the motion of particle has similar trends expect for that near to a glancing collision. In the vicinity of a glancing collision, the trend of formations is quite different from others. These results show same tendencies, even though the radius of the primary rubble pile is changed in the collision of sub-kilometer rubble piles.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
N体問題を用いたラブルパイル小惑星の衝突の検討
