Astronomers at NASA's Near-Earth Object Office have further refined the orbital data of Asteroid 2007 WD5, covered in this story. This new orbital trajectory was made possible through new observations at the German-Spanish Astronomical Center, Calar Alto, Spain; the Multi-Mirror Telescope, Mt. Hopkins, Ariz.; and the University of Hawaii telescope, Mauna Kea, Hawaii. The new data suggests that the probability of a Mars impact is 0.0 percent.
I other words, Asteroid 2007 WD5 will not impact Mars. What a shame. This could've been a great astronomical event.