Shape and distribution of rubble-pile asteroid with impact

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationInternational Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
Pages4445-4453
Number of pages9
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event59th International Astronautical Congress 2008, IAC 2008 - Glasgow, United Kingdom
Duration: 2008 Sep 292008 Oct 3

Publication series

NameInternational Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
Volume7

Other

Other59th International Astronautical Congress 2008, IAC 2008
CountryUnited Kingdom
CityGlasgow
Period08/9/2908/10/3

Fingerprint

Asteroids
piles
asteroids
asteroid
Piles
pile
nut
Brazil
regolith
centrifugal force
simulation
Spacecraft
spacecraft
Particle size
particle size
distribution
particle
trends
Computer simulation
Chemical analysis

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering
  • Astronomy and Astrophysics

Cite this

Miwa, Y., Yano, H., Morimoto, M., Mori, O., & Kawaguchi, JI. (2008). Shape and distribution of rubble-pile asteroid with impact. In International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008 (pp. 4445-4453). (International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008; Vol. 7).

Shape and distribution of rubble-pile asteroid with impact. / Miwa, Yuichi; Yano, Hajime; Morimoto, Mutsuko; Mori, Osamu; Kawaguchi, Jun'Ichiro.

International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008. 2008. p. 4445-4453 (International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008; Vol. 7).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Miwa, Y, Yano, H, Morimoto, M, Mori, O & Kawaguchi, JI 2008, Shape and distribution of rubble-pile asteroid with impact. in International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008. International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008, vol. 7, pp. 4445-4453, 59th International Astronautical Congress 2008, IAC 2008, Glasgow, United Kingdom, 08/9/29.
Miwa Y, Yano H, Morimoto M, Mori O, Kawaguchi JI. Shape and distribution of rubble-pile asteroid with impact. In International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008. 2008. p. 4445-4453. (International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008).
Miwa, Yuichi ; Yano, Hajime ; Morimoto, Mutsuko ; Mori, Osamu ; Kawaguchi, Jun'Ichiro. / Shape and distribution of rubble-pile asteroid with impact. International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008. 2008. pp. 4445-4453 (International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008).
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