"It is the stuff of nightmares and, until now, Hollywood thrillers. A huge asteroid is on a catastrophic collision course with Earth and mankind is poised to go the way of the dinosaurs.
Matt Genge, a space researcher at Imperial College, London, has calculated that something with the mass, acceleration and thrust of a small car could push an asteroid weighing a billion tonnes out of the path of Earth in just 75 days." Wanted: man to land on killer asteroid and gently nudge it from path to Earth | Guardian Unlimited
See also this: "Scientists are tracking a newly discovered Asteroid, 2002 NT7. Preliminary reports show this Asteroid, which is about two miles in circumference, is on a Collision Course with earth and early projections show Impact on 1 FEB 2019 AD." More about this here.