Astronomers say that 2017 AG13, a 111-foot asteroid that flew by Earth at a close-shave distance of about 120,000 miles on Monday morning (January 9), was spotted for the first time only about two day before it passed. The latest incident has raised concern once again about our unpreparedness to ward off a potentially devastating asteroid impact which experts say is only a matter of time.
Astronomers at the University of Arizona's Catalina Sky Survey spotted asteroid 2017 AG13 on Saturday, two days before it zipped past Earth at about 7:47 a.m. EST (1247 GMT) on Monday, January 9. It passed at a dangerously close distance of 120,000 miles, about half of the distance of the Moon to Earth, according to Slooh.
The average distance of the Moon to Earth is about 239,000 miles (385, 000 kilometers).