His discovery he made while observing other known asteroid during a call the Sun.
"When I studied them, all of a sudden, I suddenly saw another object is not moving too quickly and are fairly unusual trajectory" - said Andrea Boattini, employee Observatory Mount Lemmon in Arizona. -- "He was so bright that at first I thought that this is a comet."
Currently known about 5 thousand asteroids that cross the Earth's orbit plane, but the only discovered 10 asteroids travelling inside the orbit of Earth - the Earth-Sun.
Object found Andrea Boattini, is about 0.80 astronomical units from the Sun (an astronomical unit is equal to the average distance from Earth to the Sun).
The other two closest to our luminary asteroid located at a distance of 0.89 astronomical units and 0.93 astronomical units from the Sun. Discovered a rather large object, which is about 2 km away, but it does not threaten the Earth.