Absolute-magnitude distribution of asteroids. The distributions of primitive asteroids from SDSS and ECAS datasets used in this study are indicated by orange and blue hatches. The integrated primitive asteroid dataset of SDSS and ECAS is shown by the green line. The black dashed line is the distribution of all asteroids in the database (accessed in December 2022). The x-axis at the top corresponds to approximated diameter assuming an albedo value of p_V = 0.06 using Eq. (7), which is typical of C types.