Extended Data Fig. 2: There is less fine regolith at the OSIRIS-REx’s backup sampling site Osprey than at the primary sampling site Nightingale.
From: Fine-regolith production on asteroids controlled by rock porosity
Blue and yellow pixels represent areas where no particles bigger than 2 cm, ~ls, were mapped by ref. 43. The value DP≈ls is the upper limit for the sizes of fine regolith detected by our thermophysical model. There are fewer blue and yellow pixels at Osprey (image resolution: 0.3 cm per pixel, panels a, b) than at Nightingale (image resolution: 0.4 cm per pixel, panels c, d), implying that Osprey has less unresolved material than Nightingale. Consistently and independently, our thermophysical model indicates αOsprey<αNightingale (Supplementary Table 1, spots 609505286:610098718 and 609504794:610100730, respectively). Credit for bird graphics and PolyCam images: NASA/Goddard/University of Arizona.
