Maximum diameters of asteroids (D) that producepositive on the equator as a function of heliocentric distance (r_h ∈ [0.1, 2.0] au). The red solid and blue dashed lines are the results for magnetite and olivine, respectively. The results of perpendicular and aspect 45° models are discriminated by the line thicknesses, and the results of different rotational periods (6 h and 3 h) are discriminated by the transparency of the lines. The black lines show the slope according to a power law.