The two celestial bodies will be closest to Earth late Friday and early Saturday, in US Eastern Daylight Time, the US space agency revealed. Two large chunks of space rock will pass very close to Earth this weekend Friday night, NASA reported earlier this week. The two asteroids – named 2010 C01 and 2000 QW7 – have been documented in the NASA database for two decades under the Near-Earth Object Observations Program, the report says. "These asteroids have been well observed – one since 2000 and the other since 2010 – and their orbits are very well known," said Lindley Johnson, planetary defense officer and program executive for the Planetary Defense Coordination Office at NASA headquarters in Washington DC. The two are estimated to be 120-260 meters and 290-650 meters in size, respectively, but thankfully neither pose an impact danger, the astronomers say. Under the Near-Earth Object Observations Program, NASA astronomers keep tabs