| Abstract |
Particles recovered by the Hayabusa spacecraft are considered to be regolith particles on asteroid Itokawa. Their 3D structures and external shapes were obtained using x-ray microtomography at SPring-8. The modal abundances of minerals and density of the bulk sample are similar to those of LL chondrites. Any large-scale melting textures, such as agglutinates in lunar regolith, were not observed. The size distribution and shape distribution are also different from those of lunar regolith. Based on these data, formation and evolution of regolith particles on Itokawa will be discussed. |
