Earth will have a second moon orbiting the planet when it grabs a tiny astroid in its gravitational pull later this month, according to a new study. The big picture: The "mini-moon" will be around from Sept.

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.

2024 PT₅ will then swing past for a final goodbye on 9 January 2025, coming within 1.8 million kilometers (1.1 million miles) of Earth before heading back out into the inky blackness.