Temperature distribution on the surface of asteroids with different thermal parameter Θ, taking the shape of 1998 KY 26 as an example. The small body has a retrograde rotation around the z axis, with the Solar radiation from the direction n_in = (1, 0, 0). From top to bottom are the cases for Θ₁, Θ₂, and Θ₃, and from left to right are the isometric views, day hemispheres and night hemispheres. Note that the colour bars have different temperature scales.