Shape and distribution of rubble-pile asteroid with impact

Yuichi Miwa, Hajime Yano, Mutsuko Morimoto, Osamu Mori, Jun'Ichiro Kawaguchi

研究成果: Conference contribution

抄録

The asteroid exploration spacecraft "HAYABUSA" took high resolution pictures of asteroid "ITOKAWA". ITOKAWA is a rubble-pile asteroid, whose shape and regolith size distribution are unique. These features are caused by composition of the Brazil-Nut effect and centrifugal force by spin. The Brazil-Nut effect is generally known as the phenomenon that causes larger particles to rise to the top of the shaken granular mixtures. In this study, the behaviors of various size particles on the ground or in the space are analyzed by numerical simulation using Multi-Particle model, which is model of a rubble-pile asteroid. At first, the behaviors of particles on the ground are simulated, and it is confirmed that Brazil-Nut effect occurs. Next, the behaviors of particles in the space are simulated. From this simulation results, the internal distribution of particles' upward trend is obtained. It is compared with the known information of ITOKAWA, and the inferred internal structure of rubble-pile asteroid is discussed.

本文言語English
ホスト出版物のタイトルInternational Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
ページ4445-4453
ページ数9
出版ステータスPublished - 2008
外部発表はい
イベント59th International Astronautical Congress 2008, IAC 2008 - Glasgow, United Kingdom
継続期間: 2008 9 292008 10 3

出版物シリーズ

名前International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
7

Other

Other59th International Astronautical Congress 2008, IAC 2008
国/地域United Kingdom
CityGlasgow
Period08/9/2908/10/3

ASJC Scopus subject areas

  • 宇宙惑星科学
  • 航空宇宙工学
  • 天文学と天体物理学

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