Estimation of the space weathering timescale on (25143) Itokawa: Implications on its rejuvenation process

Context. The space weathering timescale of near-Earth S-type asteroids has been investigated by several approaches (i.e., experiments, sample analyses, and theoretical approaches), yet there are orders magnitude differences. Aims. We aim to examine the on a asteroid, Itokawa using Hayabusa-AMICA images further investigate evolutional process asteroid. Methods. focused bright mottles boulder surfaces generated via impacts with interplanetary dust particles (IDPs). compared mottle size distribution an IDP flux model determine timescale. Results. As result, we found that Itokawa's is 10$^3$ years (in range 10$^2$-10$^4$ years), which consistent light ions from solar wind. Conclusions. From this conclude surface weathered shortly in but portions exposed seismic shaking triggered recent impact created Kamoi crater.