ИСТИНА

Asteroid 101955 Bennu, as the object of the OSIRIS-Rex mission, is one of the near-Earth asteroids (NEAs) of taxonomic type B with the most primitive mineralogy similar to CI and CM carbonaceous chondrites with predominance of hydrated compounds. At the study of the asteroid at the present time with the spacecraft, it is first discovered dust activity of Bennu. This process is explained by the formation of ice dust particles during cracking and drying hydrated silicates, which make up a significant proportion of Bennu’s matter, over the period of its staying at elevated subsolar temperatures. Another mechanism of dust activity of such primitive asteroids deserves attention, that is, sublimation of ice (mainly H2O) located in the near-surface or deeper layers of the bodies, where the "heat wave" reaches when the temperature on the surface increases, especially at seasonal changes. Aim of the work is a computer simulation of the temperature regime of Bennu and searching areas where the presence of water ice is possible under its surface.