Dust productivity and impact collision of the asteroid (596) Scheila

Photometric observations of asteroid (596) Scheila were obtained during and after its 2010 outburst. The estimated radius of the body (spherical approximation of the asteroidal body) was 51.2±3.0 km and 50.6±3.0 km for different methods. The ejected dust mass from the asteroid ranged from 2.5×107 to 3.4×107kg for different methods. An impact mechanism for triggering Scheila׳s activity is discussed. A few days before the impact, Scheila passed through the corridors of two potential cometary streams.