Though the mini-moon will only be in Earth’s orbit for about two months, it’ll stay close to the planet for a few months, making its closest approach in January 2025, after which it’s expected to make a return to the planet’s orbit in 2055, according to the study.

Earth is about to get a new neighbor in the form of an asteroid. By Nov. 25, the mini-moon is expected to break free of Earth’s gravitational pull and be once again on its way through space. (Handout/NASA/TNS) LOS ANGELES – Earth is about to get a new neighbor in the form of an asteroid. But this one won’t be making an impact.

An Arjuna asteroid, discovered in August, will become a "mini-moon" event for nearly two months from Sept. 29 to Nov. 25.