The rubble-pile asteroid Itokawe as observed by Hayabusa

Science

Volumn 312, Issue 5778, 2006, Pages 1330-1334

  Fujiwara, A ^a   Kawaguchi, J ^a   Yeomans, D K ^b   Abe, M ^a   Mukai, T ^c   Okada, T ^a   Saito, J ^a   Yano, H ^a   Yoshikawa, M ^a   Scheeres, D J ^d   Barnouin Jha, O ^e   Cheng, A F ^e   Demura, H ^f   Gaskell, R W ^b   Hirata, N ^c   Ikeda, H ^a   Kominato, T ^g   Miyamoto, H ^h   Nakamura, A M ^c   Nakamura, R ⁱ   Sasaki, S ^j   Uesugi, K ^a   more..

^a JAPAN AEROSPACE EXPLORATION AGENCY   (Japan)

^b CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^c KOBE UNIVERSITY   (Japan)

^d UNIVERSITY OF MICHIGAN   (United States)

^e JOHNS HOPKINS UNIVERSITY   (United States)

^f UNIVERSITY OF AIZU   (Japan)

^g NEC CORPORATION   (Japan)

^h UNIVERSITY OF TOKYO   (Japan)

ⁱ NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY AIST   (Japan)

^j NATIONAL ASTRONOMICAL OBSERVATORY OF JAPAN   (Japan)

more..

Author keywords

[No Author keywords available]

Indexed keywords

ASTROPHYSICS; MASS TRANSFER; POROSITY; SOLAR SYSTEM; SPACECRAFT;

ASTEROIDS; COLLISIONAL BREAKUP; HAYABUSA SPACECRAFT; MASS MOVEMENT;

SPACE RESEARCH;

ASTEROID; TOPOGRAPHY;

ARTICLE; ASTRONOMY; DENSITY; GRAVITY; JAPAN; MASS; MINERALOGY; POROSITY; PRIORITY JOURNAL; SPACE FLIGHT; SURFACE PROPERTY;

EID: 33744808559     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1125841     Document Type: Article

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30. 2/2 - U(r), where U is the gravitational plus centripetal force potential, r defines a location on the surface of the body, and V is the speed of a particle relative to the rotating body frame (14). The gravitational plus rotational potential is defined as the value of J evaluated for zero speed or the value of -U(r) over the surface of the body. The speed necessary to have sufficient energy to travel from the lowest point of the potential [largest value of U(r) at location r*] to any other point r on the surface of the body is then √2[U(r*)-U(r)], which is plotted in the figure.
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32. We thank the mission operation and spacecraft team of the Hayabusa project at ISAS/JAXA for their efforts that resulted in making Hayabusa the first Japanese spacecraft rendezvoused and landed at the asteroid. This research was supported by ISAS/JAXA, NASA, Kobe University through the 21st Century COE Program of the Origin and Evolution of Planetary Systems, and University of Aizu. A portion of the research reported in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA.