Department of Aeronautics and Astronautics, School of Engineering, University of Tokyo
JAXA Space Exploration Center, Japan Aerospace Exploration Agency (JAXA)(JSPEC)
JAXA Space Exploration Center, Japan Aerospace Exploration Agency (JAXA)(JSPEC)
JAXA Space Exploration Center, Japan Aerospace Exploration Agency (JAXA)(JSPEC)
Lunar and Planetary Exploration Program Group, 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 spacecraft "HAYABUSA" performed observations of asteroid "ITOKAWA" including high resolution pictures. These observations show that ITOKAWA is a rubble-pile asteroid which consists of the rocks piled up by universal gravity. Its unique shape and regolith distribution are caused by composition of universal gravity, friction, centrifugal force by spin and impacts. These impacts are given by collisions of small falling particles. In this study, the behaviors of various size particles of a rubble-pile asteroid in the space are analyzed by numerical simulations using multi-particle model. We focus the Brazil-Nut effect which is generally known as the phenomenon that causes the larger particles to rise to the top of the shaken granular mixtures in a container and the Arch effect which has an important role in that effect.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
多粒子数値解析を用いたラブルパイル小惑星の構造に対する考察
