The asteroid's visit will bring it within a cosmically close but still super safe 3.8 million miles (6.2 million kilometers) of Earth. HL1 is classified as "potentially hazardous" thanks to what NASA calls the "potential to make threatening close approaches to the Earth."
The Virtual Telescope Project is already tracking HL1 and created a cool animation of the asteroid trucking across space on Oct. 21. The asteroid appears as a bright point moving against a backdrop of stars.
Asteroid 1998 HL1 is estimated to be between 1,400 and 3,200 feet in size (440 and 990 meters). That means it could potentially be as long as Navy Pier in Chicago. It's a good thing it's on track to miss us.
Be sure to tell it "Safe travels!" when it flies by on Friday.
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