While the orbital mechanics are interesting, calling this asteroid Earth's moon is stretching the definition of a moon quite a lot. The Cruithne orbits the sun,

While the orbital mechanics are interesting, calling this asteroid Earth's moon is stretching the definition of a moon quite a lot. The Cruithne orbits the sun, not Earth. As Wikipedia puts it: The key difference between a satellite and a quasi-satellite is that the orbit of a satellite of Earth fundamentally depends on the gravity of the Earth–Moon system, whereas the orbit of a quasi-satellite would negligibly change if Earth and the Moon were suddenly removed because a quasi-satellite is orbiting the Sun https://en.wikipedia.org/wiki/Other_moons_of_Earth#Quasi-satellites_and_trojans https://en.wikipedia.org/wiki/Other_moons_of_Earth#Quasi-sat...