Asteroid 2018 FQ3, first observed at Catalina Sky Survey on March 20, flew past Earth at a distance of 0.73 LD / 0.00187 AU (~279 748 km / 173 827 miles) on March 19, 2018.
This is Apollo class asteroid with an estimated diameter of 5.1 and 11 m (16.7 - 36 feet).
It flew past Earth at a speed (relative to the Earth) of 11.04 km/s at 05:59 UTC on March 19, one day before it was discovered.
Featured image: The green line indicates the object's apparent motion relative to the Earth, and the bright green marks are the object's location at approximately one-hour intervals. The Moon's orbit is grey. The blue arrow points in the direction of Earth's motion and the yellow arrow points toward the Sun. Credit: Minor Planet Center.