A recently discovered asteroid streaked close to Earth of Friday in the second such occurrence in a week. Measuring between 50 and 130 feet (15 and 40 meters) across, the asteroid’s trajectory carried it safely past the Earth with no chance of an impact. Dubbed 2018-CB, it was initially projected to zip within 39,000 thousand miles (64,000 km) of Earth, said NASA scientists on Friday. The range is less than one-fifth of the approximate 240,000-mile (386,000-km) distance to the moon, said Paul Chodas, manager of the Center for Near-Earth Object Studies at the National Aeronautic and Space Administration’s Jet Propulsion Laboratory in Pasadena, California. “Asteroids of this size do not often approach this close to our planet - maybe only once or twice a year,” he said. "It is a reminder that asteroids can pass very close to our planet and its important that we find these objects when they do get close." Although considered relatively small by astronomical terms, 2018-CB may be larger than a meteorite that streaked through the atmosphere and exploded into pieces over Chelyabinsk, Russia, in 2013, sending a shock wave that smashed windows, damaged buildings and injured 1,200 people. On Tuesday, another asteroid, estimated at between 50 and 100 feet (15 and 30 meters) in size, passed within 114,000 miles (184,000 km) of the planet. Both asteroids were discovered this month by astronomers at the NASA-funded Catalina Sky Survey near Tucson, Arizona, the space agency said. A whopper asteroid named Apophis — estimated at approximately 1,000 feet or more than 300 meters — will pass at just one-tenth the distance between Earth and the moon in 2029. In the meantime, astronomers are on the lookout for asteroids lurking in the cosmic shadows.