NASA's Lucy mission adds 9th asteroid to its list of attractions

The asteroid still doesn't have a name, and it likely won't for a while

Lucy launched in October 2021 and is bound for the Trojan asteroids, which, thanks to the pull of Jupiter's immense gravity,

 In 2027, Lucy will become the first human-made object to fly past one of these asteroids.

The mission was designed to zoom past a main-belt asteroid then swing through a complicated itinerary of Trojan asteroids

 scientists have determined that one of Lucy's original target asteroids has a companion:

In March, astronomers observing Polymele in preparation for Lucy's eventual visit watched the asteroid pass in front of a star

 scientists know more about the asteroid's exact orbit, which might not happen until Lucy's visit.

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