Retrieved particle-size distributions calculated from Olivenza (LL5) spectra overlaid on the conformal cylindrical projection map of Itokawa. (a) Particle size retrieved using the CPRMS algorithm. (b) Same as (a), but interpolated to 3° × 3°. (c) Particle size retrieved using the ABS algorithm. (d) Same as (c), but interpolated to 3° × 3°. The belt-like structure in (c) was caused by the denser data points near the equator, as shown in Fig. 1. The pink box indicates a typical rough terrain, and each of the two yellow boxes indicates a typical smooth terrain.