The Chelyabinsk superbolide was the largest known natural object to enter the Earth ’ s atmosphere since the Tunguska event in 1908 and it has become a template to understand , manage and mitigate future impacts .
Although the event has been documented in great detail , the actual pre-impact orbit of the parent body is still controversial .
Here , we revisit this topic using an improved Monte Carlo approach that includes the coordinates of the impact point to compute the most probable solution for the pre-impact orbit ( a = 1.62 au , e = 0.53 , i = 3 \aas@@fstack { \circ } 97 , \Omega = 326 \aas@@fstack { \circ } 45 and \omega = 109 \aas@@fstack { \circ } 71 ) .
We also check all the published solutions using a simple yet robust statistical test to show that many of them have problems to cause an impact at the right time .
We use the improved orbit and N -body simulations to revisit the dynamical status of a putative Chelyabinsk asteroid family and confirm that it could be linked to resonant asteroids 2007 BD _ { 7 } and 2011 EO _ { 40 } .
In addition , and as the classification of Chelyabinsk meteorites is well established , a search for meteorite falls of the same chondrite group and petrologic type gives some evidence for the existence of an associated LL5 chondrite cluster .