"In April 2008 it was reported that 13 year-old Nico Marquardt from Potsdam, Germany had recalculated the odds as part of a science competition, and found the risk had been underestimated. Taking into account the possibility of the asteroid colliding with one or more of the estimated 40,000 artificial satellites orbiting the earth, possibly causing a shift in its orbit, increases the probability of a collision with [5] earth on its next fly-by in 2036 to 1 in 450. NASA was reported as confirming these results with the ESA[6], yet they have since apparently denied these claims, and on April 15, 2008 it was reported Nico Marquardt's calculations were incorrect." -- Wikipedia http://en.wikipedia.org/wiki/99942_Apophis/