The space rock is measures nearly 60 by 140 feet and will pass closer to Earth than the moon today.
DX110 will streak by around 217,000 miles from our planet.
That’s "9/10th of the distance to the moon," a NASA rep said.
It’s larger than the asteroid that caused panic and injury in Russia last year but USA Today reports the chance of it striking the big blue marble is one in 10 million.
DX110 will be at its closest around 3pm CST, and you can try to watch the action on the Slooh space telescope website. We say “try” because even a Slooh scientist admits "there is a high probability, we will not capture the asteroid during the broadcast."
The telescope is powerful enough to see the rock from its base in the Canary Islands but predicting its orbit is much harder.
NASA says the flyby will take just under eight hours and again, they say, don’t worry. In the last year, 21 asteroids have whizzed by even closer to Earth.