JPL Small-Body Database Browser If you click on this site, JPL supplies an inter-active map showing you the path of 2007 WD5 in our solar system, use the scroll elevator on the right, and "Zoom" on the bottom for all angles the asteroid will come in. You'll need Java.
I know people speculate on what this has to do with earth, which is experiencing its own asteroid fly-by in about an hour then into tomorrow and strickly a telescopic event. But as for the Martian visitor, if it does collide, it will release 3 MEGATONS OF ENERGY which is much like the Tunguska event in Siberia, 1908. The high air-blast alone destroyed large areas of forest, and considering the Martian atmosphere is alot thinner than ours, this asteroid is much more likely to hit the surface.