While searching for near Earth-asteroids, astronomers at Lowell Observatory found an object which orbits closer to the Sun than any other asteroid. Designated 2004 JG6, the asteroid is probably between 500 - 1,000 metres in diameter (1,600 - 3,200 feet) and takes about six months to go around the Sun. Objects like this, which travel within Earth's orbit are called Apoheles, and they're very difficult to discover because they spend so much time near the Sun, invisible to telescopes in the daytime sky. Fortunately, 2004 JG6 poses no threat to Earth.