ИСТИНА

Discovering spectral signs of simultaneous sublimation activity in September 2012 on four main-belt primitive asteroids (145) Adeona, (704) Interamnia, (779) Nina, and (1474) Beira at their perihelion distances [1, 2] raised questions about probable mass nature of this phenomenon on main-belt bodies which could include free water ice. As is known, mineralogy of solid rock bodies is sensitive to conditions of their origin. On the other hand, ellipticity of orbit of a small planet makes a possibility to test volatility of the body’s matter depending of heliocentric distance and changing the surface temperature. Now we are able to confirm this periodic process on Nina approached to perihelion in September 2016.