An asteroid slightly smaller than the largest structure in the U.S. is slated to harmlessly zoom past Earth later this month.

Known as 2006 SF6, the space rock will zip past Earth on Nov. 20 at approximately 2.7 million miles (0.02886 astronomical units) at roughly 12:01 a.m. EDT, according to NASA's Center for Near Earth Object Studies, which tracks near-Earth objects.

According to a 2018 report put together by Planetary.org, there are more than 18,000 NEOs.

"Potentially hazardous" NEOs are defined as space objects that come within 0.05 astronomical units and measure more than 460 feet in diameter, according to NASA.

Asteroid 2006 SF6, which was discovered on Sept. 17, 2006, is believed to be between 919 feet and 2,034 feet in diameter, slightly smaller than the KVLY-TV mast in Blanchard, S.D., the tallest structure in the U.S. and fourth tallest in the world.

The space rock will fly past Earth at approximately 17,800 miles per hour and will come within close proximity to our planet again on Nov. 5, 2020, two days after the U.S. presidential election.

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