Special Reports

Pole and Global Shape of 25143 Itokawa

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Science  02 Jun 2006:
Vol. 312, Issue 5778, pp. 1347-1349
DOI: 10.1126/science.1126574

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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° and a declination of –66.30° (52000 equinox) or equivalently 128.5° and –89.66° in ecliptic coordinates with a 3.9° 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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