At 2:18 p.m. on September 7 Asteroid 2014 RC will pass 25,000 miles from Earth or about 10% of the distancebetwen the Earth and the Moon. At just 60 feet across it is a small asteroid that will not be visible to the unaided eye. There is no danger of an impact with the Earth though it does qualify as a near miss. Even if an impact occured the explosion would be just 4 times the size of the atomic bomb dropped on Nagasaki Japan or about 90 kilotons of TNT or .
The Nebula Hypothesis says that asteroids a remnant from formation of the solar system but suffers from problems such things as an imbalance of angular momentum.. Also real planets both in the solar system and among exoplanets that are not in orbits predicted by the Nebula Hypothesis. Alternative theories include an exploded or shattered planet between Mars and Jupiter. They could have originated from outside the solar system which from a creationist perspective could have been created on day four of the creation week with the rest of the universe. There is also the idea that they formed from material ejected from Earth during the Genesis Flood.