Astronomers have confirmed that Earth will temporarily gain a “second moon” this autumn as a small celestial object, identified as 2024 PT5, enters the planet’s orbit. Dubbed a “mini-moon,” this small body will be captured by Earth’s gravitational pull and orbit the planet for just two months before continuing its journey through space.
What Is 2024 PT5?
2024 PT5 is a small near-Earth object, likely an asteroid, measuring just a few meters in diameter. These so-called mini-moons are rare but not unprecedented, as Earth’s gravitational field occasionally captures smaller objects temporarily. While not a true second moon like our permanent lunar companion, 2024 PT5 will orbit Earth briefly, making it a fascinating phenomenon for astronomers and skywatchers alike.
When and How to See the Second Moon:
Astronomers expect 2024 PT5 to become visible to advanced telescopes this autumn, though it will not be bright enough to be seen with the naked eye. The mini-moon is expected to orbit Earth for approximately two months before breaking free of the planet’s gravitational influence and returning to its independent path around the sun.
A Brief Visit:
This isn’t the first time Earth has captured a mini-moon. In 2020, a similar object called 2020 CD3 was briefly captured by Earth’s gravity before drifting away. These events are often short-lived, as objects like 2024 PT5 are too small and fast-moving to remain in Earth’s orbit for long.
Though its visit will be brief, 2024 PT5 has excited astronomers who are keen to study how small celestial objects interact with Earth’s gravitational field.