3753 Cruithne was dubbed as Earth's second moon, but it's not true. It's an Aten asteroid, about 5 kilometers in diameter, that orbits the Sun in a bean-shaped orbit that effectively describes a horseshoe. Its period of revolution is approximately 364 days, because of this, Cruithne and Earth appear to ‘follow' each other in their paths around the Sun. The asteroid completes a full orbit around Earth once every 800 years, but during that same amount of time, it completes roughly 800 orbits aroun

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