You might think of asteroids as just rocks of various sizes floating around in space. But they’re vastly more complex than that: they show an incredible diversity in size, shape, composition and even the way they change over time.

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.