NASA scientists have calculated that Earth will capture a "second moon" on Sunday (Sept. 29). The "mini-moon" comes in the form of the tiny asteroid 2024 PT5, which usually orbits the sun as part of a small asteroid belt that follows Earth.

A small asteroid, 2024 PT5, will spend the next two months alongside our planet as a mini moon before swooping back to deep space

Earth will capture a miniature, “second moon” this week, according to NASA scientists. The new moon is actually a tiny asteroid dubbed 2024 PT5. It will start orbiting the planet in a horseshoe path and stick around for a little less than two months before escaping Earth’s gravitational pull and going back to its regular orbit around the sun.