Investigation of the dynamic evolution of Hobson asteroid family

Abstract

We have found 11 new members of the Hobson asteroids family: (537249) 2015 HM190, 2007 EH116, 2007 HC54, 2008 WV149, 2010 GN203, 2011 SU302, 2015 FV225, 2015 HV138, 2015 OP104, 2015 PM156, 2019 PS30. We estimated the Yarkovsky semimajor axis drift rate, the Hill sphere’s radii, and the escape velocity for all asteroids of the family. Simulation of the dynamic evolution of asteroids with allowance for the Yarkovsky effect has been carried out. Based on the simulation results, estimates of the asteroid pairs’ age included in the amily are obtained. The age of the Hobson asteroid family is about 400 kyr.