2003 YN107
Asteroid
2003 YN₁₀₇ is a tiny asteroid, classified as a near-Earth object of the Aten group moving in a 1:1 mean-motion resonance with Earth. Because of that, it is in a co-orbital configuration relative to Earth. Wikipedia
Orbital period: 359 days
Discovered: December 20, 2003
Discoverer: Lincoln Near-Earth Asteroid Research
Earth MOID: 0.0045919 AU (686,940 km)