Saturday, October 14, 2017
"The house-size asteroid that just passed by Earth, almost as close as many satellites in orbit, will be back -- and a future visit might lead to it taking up permanent residency here.
On Tuesday night/Wednesday morning, Asteroid 2012 TC4 safely passed by our planet at an altitude of 27,300 miles (44,000 kilometers), just a few thousand miles above the level of satellites in geosychronous orbit. That's nearly twice as close as when it passed us almost exactly five years ago, about a week after it was first discovered in October 2012.
The most recent models of the space rock's future path, which can be altered by Earth's gravity each time it makes a close pass, have ruled out the possibility that it will impact Earth when it makes another close call in 2050.
But the same can't be said for its visit in 2079..."
Asteroid that just buzzed Earth may not miss on return visit - CNET