(a) Global distribution of spectral slope (b-x) and reflectance factor. The white cross indicates the median value of the entire Ryugu surface. Yellow lines indicate the 65 and 95% distribution of all pixels. crosses indicate the 12 local spectral features. (b) Photometrically standardized spectra of the 12 regions shown in Figs. 12–14. The spectra on the right are divided by the spectrum of R3 to emphasize the variations.