Thermal inertia of main belt asteroids smaller than 100 km from IRAS data

  title={Thermal inertia of main belt asteroids smaller than 100 km from IRAS data},
  author={Marco Delb{\'o} and Paolo Tanga},
Recent works have shown that the thermal inertia of km-sized near-Earth asteroids (NEAs) is more than two orders of magnitude higher than that of main belt asteroids (MBAs) with sizes (diameters) between 200 and 1,000 km. This confirms the idea that large MBAs, over hundreds millions of years, have developed a fine and thick thermally insulating regolith layer, responsible for the low values of their thermal inertia, whereas km-sized asteroids, having collisional lifetimes of only some millions… CONTINUE READING
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