Mini moons may zip around Earth

One found so far, but many more of these huggable-sized asteroids exist, astronomers say

Mini moon trajectory map

JUST VISITING  A mini moon sidles up to Earth (yellow trajectory) and dances along one possible complex trajectory before leaving several months later (red trajectory). Earth and moon are not shown to scale, but the mini moon trajectory is.

K. Teramura/UH IfA 

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