The space rock known as 2014 DX110 is due to make its closest approach at about 4 p.m. ET Wednesday — at a distance of about 216,000 miles (345,600 kilometers), or roughly 90 percent of the moon's orbital distance. The passing asteroid is thought to be 60 to 140 feet (19 to 43 meters) wide. Sixty feet is the estimated width of the asteroid that broke apart roughly 20 miles (30 kilometers) above Chelyabinsk on Feb. 15, 2013, injuring hundreds of people. The Virtual Telescope Project 2.0, based in Italy, will air a webcast about 2014 DX110 at 3:30 p.m....