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Pole and global shape of 25143 Itokawa
Authors:Demura Hirohide  Kobayashi Shingo  Nemoto Etsuko  Matsumoto Naoya  Furuya Motohiro  Yukishita Akira  Muranaka Noboru  Morita Hideo  Shirakawa Ken  Maruya Makoto  Ohyama Hiroshi  Uo Masashi  Kubota Takashi  Hashimoto Tatsuaki  Kawaguchi Jun'ichiro  Fujiwara Akira  Saito Jun  Sasaki Sho  Miyamoto Hideaki  Hirata Naru
Affiliation:Department of Computer Software, University of Aizu, Ikki-machi, Aizu-Wakamatsu City, Fukushima 965-8580, Japan.
Abstract: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.
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