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. Asteroid 2014 RC is just 60 feet across ans will not be visible to the unaided eye. It is no danger of an impact with the Earth but in Astronomy terms it is a near miss, Even it did impact the explosion would only be at about 90 kilotons of TNT or 4 times the size of the atomic bomb dropped on Nagasaki Japan.
The Nebula Hypothesis claims that asteroids a remnant from formation of the solar system but the theory has problems with an inbalences of angular momentum. Further more thereare real planets both in the solar system and 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.