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Near-Infrared Spectral Results of Asteroid Itokawa from the Hayabusa Spacecraft

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Science  02 Jun 2006:
Vol. 312, Issue 5778, pp. 1334-1338
DOI: 10.1126/science.1125718

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The near-infrared spectrometer on board the Japanese Hayabusa spacecraft found a variation of more than 10% in albedo and absorption band depth in the surface reflectance of asteroid 25143 Itokawa. Spectral shape over the 1-micrometer absorption band indicates that the surface of this body has an olivine-rich mineral assemblage potentially similar to that of LL5 or LL6 chondrites. Diversity in the physical condition of Itokawa's surface appears to be larger than for other S-type asteroids previously explored by spacecraft, such as 433 Eros.

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