While space agencies simulate an asteroid impact this week at the 2019 Planetary Defense Conference, there’s a real asteroid they’re monitoring that will make a close appearance in just 10 years.

99942 Apophis is among the most infamous near-Earth objects. When astronomers at Kitt Peak National Observatory discovered it in 2004, they initially calculated a 2.7 percent chance that it would hit Earth and assigned it a level 4 on the Torino Scale, the highest assignment for a near-Earth object ever. Though it has since been downgraded and is expected to pose no threat to the planet, it’s a real-life version of the simulated asteroid scenarios that scientists are currently playing out.

“The Apophis close approach…