Due to its estimated size of 300 to 900 meters in diameter, 2004 XP14 had been classified as a PHA: Potentially Hazardous Asteroid. How close was it to hitting us? 268,624 miles. Or 1.1 times the Moon's average distance from Earth. After extensive monitoring, scientists correctly predicted XP14 would take a detour around Earth. But there's still a possibility of it striking in the near future.