2010 TK7

Earths only known Trojan asteroid

2010 TK7 has a diameter of about 300 meters (1,000 ft).[4] Its path oscillates about the Sun–Earth L4 Lagrangian point (60 degrees ahead of Earth), shuttling between its closest approach to Earth and its closest approach to the L3 point (180 degrees from Earth).

Asteroid 2010 TK7 should remain in a stable, elliptical orbit for at least another 10,000 years, slowing oscillating between being 12 million and 200 million miles away from us.