The moon will soon have a companion in Earth's orbit for a limited time.
An Arjuna asteroid will become a "mini-moon" event for nearly two months starting Sept. 29, according to a study published in the journal Research Notes of the American Astronomical Society. The tiny asteroid, which researchers named "2024 PT5," will temporarily orbit Earth before returning to an asteroid belt revolving around the sun.
Scientists discovered the object Aug. 7 using the Asteroid Terrestrial-impact Last Alert System in Sutherland, South Africa during routine monitoring, according to the study.
The length of mini-moon events can vary with some lasting one or more years to complete a full or multiple revolutions around Earth. Others do not complete a full revolution lasting a few months, weeks or even days, according to Space.com.
Previous mini-moon events occurred in short-lived mini moon in 1981 and 2022, researchers added.
Stunning photos:Partial lunar eclipse occurs during Harvest supermoon
What are mini-moons?
"Mini-moon" events are when pieces in space like an asteroid or floating pieces of space junk temporarily participate in orbiting the Earth with some completing a full revolution.
In order to be considered a mini-moon, an incoming body must reach Earth at a range around 2.8 million miles (4.5 million km) and at a steady space of about 2,200 mph (3,540 km/h), according to Universidad Complutense de Madrid professor Carlos de la Fuente Marcos.