You are closer than you think. The moon's gravitational pull will effect 2005yu55 will it hit I'm not sure it has slowed down some and this will effect the timing of this.But this have been thought of the pull of our moon can turn 2005yu55 at a left angle of flight and bring it on a path to Eart...
Yes like what was ,I thinking? N.A.S.A got it right.