On Tuesday, March 10, 1998, Brian Marsden, Director of the International Astronomical Union's central telegram bureau in Cambridge, Mass., announced that celestial object 1997XF, a 1 to 2 mile wide asteroid, could pass within 30,000 miles of Earth in October of the year 2028. One day later, scientists from NASA's Jet propulsion Laboratory announced that the asteroid would instead miss Earth by 500,000 to 600,000 miles.
JPL's Paul Chodas said that the chance of it impacting the Earth was "...so unlikely as not to worry about."
Essentially, zero.

Not that I doubt the scientists and their calculations, but we're talking about knowing exactly where something's going to be  weeks from now! How confident are you about predicting the exact location of a speeding space object  months away?
Think about it.

Nevertheless, it is coming.
There may be questions as to where, exactly.
But at least now you know when.