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Latest Paper:
Hirohide Demura,
Shingo Kobayashi,
Etsuko Nemoto,
Naoya Matsumoto,
Motohiro Furuya,
Akira Yukishita,
Noboru Muranaka,
Hideo Morita,
Ken Shirakawa,
Makoto Maruya,
Hiroshi Ohyama,
Masashi Uo,
Takashi Kubota,
Tatsuaki Hashimoto,
Jun'ichiro Kawaguchi,
Akira Fujiwara,
Jun Saito,
Sho Sasaki,
Hideaki Miyamoto,
Naru Hirata
Department of Computer Software, University of Aizu, Ikki-machi, Aizu-Wakamatsu City, Fukushima 965-8580, Japan.
The locations of the pole and rotation axis of asteroid 25143 Itokawa were derived from Asteroid Multiband Imaging Camera data on the Hayabusa spacecraft. The retrograde pole orientation had a right ascension of 90.53 degrees and a declination of -66.30 degrees (52000 equinox) or equivalently 128.5 degrees and -89.66 degrees in ecliptic coordinates with a 3.9 degrees margin of error. The surface area is 0.393 square kilometers, the volume is 0.018378 cubic kilometers with a 5% margin of error, and the three axis lengths are 535 meters by 294 meters by 209 meters. The global Itokawa revealed a boomerang-shaped appearance composed of two distinct parts with partly faceted regions and a constricted ring structure.
J Saito,
H Miyamoto,
R Nakamura,
M Ishiguro,
T Michikami,
A M Nakamura,
H Demura,
S Sasaki,
N Hirata,
C Honda,
A Yamamoto,
Y Yokota,
T Fuse,
F Yoshida,
D J Tholen,
R W Gaskell,
T Hashimoto,
T Kubota,
Y Higuchi,
T Nakamura,
P Smith,
K Hiraoka,
T Honda,
S Kobayashi,
M Furuya,
N Matsumoto,
E Nemoto,
A Yukishita,
K Kitazato,
B Dermawan,
A Sogame,
J Terazono,
C Shinohara,
H Akiyama
Hayabusa Project Team, Institute of Space and Astronautical Sciences (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan. saitoj@planeta.sci.isas.jaxa.jp
Rendezvous of the Japanese spacecraft Hayabusa with the near-Earth asteroid 25143 Itokawa took place during the interval September through November 2005. The onboard camera imaged the solid surface of this tiny asteroid (535 meters by 294 meters by 209 meters) with a spatial resolution of 70 centimeters per pixel, revealing diverse surface morphologies. Unlike previously explored asteroids, the surface of Itokawa reveals both rough and smooth terrains. Craters generally show unclear morphologies. Numerous boulders on Itokawa's surface suggest a rubble-pile structure.
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