There have been several instances where an asteroid has skimmed past Earth. Now, imagine the damage that could be done by an asteroid the size of a house entering the atmosphere at more than 45,000 km/h.
Now, even though this asteroid will be passing by inside the orbit of the Moon, this is still a safe pass, and asteroid 2010 WC9's orbit has been updated now to the point where it was retired from the Sentry Risk table on May 10, 2018 - just two days after it was re-found.
In February of 2018 in Russian Federation offered for United States dollars 210 billion to create a fusion megarocket to repel the attack from outer space (asteroid defense weapon).
"Discovered at Catalina Sky Survey in November 2010, it was subsequently lost, until its rediscovery on May 8th, 2018".
A big asteroid is expected to fly by earth at 28,655 miles per hour on Tuesday - but will probably miss. Your best bet for generating a refined track for the asteroid is to use NASA JPL's Horizons web interface to generate Right Ascension/Declination coordinates for the 2010 WC9 for your location.
The near-Earth asteroid 2010 WC9, which is thought to be between 125 feet and 390 feet (38 to 119 meters) wide, will get within 126,000 miles (203,000 kilometers) of Earth tomorrow evening (May 15) - about half the distance between our planet and the moon.
The asteroid of 18 magnitudes is fainting and now at +15 mag. Experts suggest it might get as bright as +11 mag when it closely passes from the Earth.
Pacific Standard Time: 3:15 p.m. "This asteroid was "lost" and then discovered again".
"The broadcast will be less than 25 minutes in duration, as the asteroid will cross our field of view within that period of time", he added. The asteroid will proceed pretty quickly (30 minutes of arc per second). We are of course collecting astrometric data whilst this is happening, but the motion of the asteroid will be apparent every five seconds!