Two large asteroids will fly safely past Earth overnight Sept. 13-14 (Eastern U.S. time). Space agencies are tracking the objects, but orbit calculations ruled out any chance that the objects could pose a threat to our planet. According to NASA, these asteroids have been well observed—once since 2000 and the other since 2010—and their orbits are very well known. Both of these asteroids are passing at about 14 lunar distances from the Earth, or about 3.5 million miles away. Near-Earth asteroid 2010 C01, estimated to be 400 to 850 feet (120 to 260 meters) in size, will safely pass Earth at 11:42 p.m. EDT on Sept. 13 (3:42 UTC on Sept. 14). The second object, 2000 QW7 is estimated to be 950 to 2,100 feet (290 to 650 meters) in size will pass later at 7:54 a.m. EDT Sept. 14 (23:54 UTC). Near-Earth objects (NEOs) are asteroids and comets that orbit the Sun, but their orbits bring them into Earth’s neighborhood – within 30 million miles of Earth’s orbit.