Summary of ATPM chi-square fitting results to the Lebofsky et al. (1981) thermal-infrared observations of (1862) Apollo. The possible thermal inertia distribution (top left), and the co-variance with thermal inertia of the average effective diameter (top right), geometric albedo (bottom left), and roughness fraction (bottom right) derived at the 3-σ confidence level for each of the three different shape model variants (legend).