The acceleration of an asteroid (such as 2012DA14) as it approaches earth is proportional to the reciprocal of distance (r)$r$ from earth center, squared. the derivative of the acceleration, or jerk, is then proportional to the cube of the reciprocal of distance r$r$, and the speed (r')$v$. Thus the jerk is rapidly increasing as the asteroid approaches. WillWill the asteroid experience stresses from the jerk that could possibly cause it to break up?