Top: sample of two fits of Bennu (in color), for which the reduced χ² ~ 2.8–3.5. Thesynthetic spectra were generated using an intimate mixtures of small particles of Tagish Lake (desiccated at 102° C) mixed with other small constituents such as DOM 08003 and Mokoia (model 1), or mixed with larger particles of Niger (at 22° C) (model 2). The average spectrum of Bennu is shown by the solid black line, and errors appear as dotted black lines. Bottom: representation of Bennu spectrum minus the synthetic spectra (in color), compared with the computed error of the Bennu spectrum (in black).