❝ An asteroid roughly the size of a 10-story building gave Earth a particularly close pass Monday morning.
Asteroid 2017 AG13 came within half the distance from Earth to the moon as it buzzed by early Monday morning at 4:47 a.m. PT. The fly-by happened shortly after scientists at the Catalina Sky Survey first discovered the space rock on Saturday…
❝ 2017 AG13 isn’t so big it would have meant an extinction-level event had it been a direct hit. But if a good size chunk of it made it through Earth’s upper atmosphere near a populated area, there might have been damage like we saw in 2013 when a bolide collided with the atmosphere over the Russian city Chelyabinsk. In that event, a fireball streaked over the city, releasing 500 kilotons of energy as it ran up against some serious resistance from Earth’s atmosphere and exploded, blowing out windows all over town in the process.
❝ The asteroid is about 11 to 34 meters across, according to the Slooh Observatory, and moving very fast relative to Earth at 16 kilometers per second. That speed, coupled with 2017 AG13’s dim brightness level, made it difficult to spot with telescopes.
Cue theme from Twilight Zone.