CAPE CANAVERAL, Fla. — Planet Earth is parting company with an asteroid that’s been tagging along as a “mini moon” for the past two months.
The harmless space rock will peel away Monday, overcome by the stronger tug of the sun’s gravity. But it will zip closer for a quick visit in January.
NASA will use a radar antenna to observe the 33-foot asteroid then. That should deepen scientists’ understanding of the object known as 2024 PT5, possibly a boulder that was blasted off of the moon by a crater-forming asteroid.
While not technically a moon — NASA stresses that it was never captured by Earth’s gravity and fully in orbit — it’s “an interesting object” worthy of study.
The astrophysicist brothers who identified the asteroid’s “mini moon behavior,” Raul and Carlos de la Fuente Marcos of Complutense University of Madrid, have collaborated with telescopes in the Canary Islands for hundreds of observations so far.
Currently more than 2 million miles away, the object is too small to see without a powerful telescope. It will pass as close as 1.1 million miles from Earth in January before zooming farther into the solar system while orbiting the sun, not to return until 2055. That’s almost five times farther than the moon.
First spotted in August, the asteroid began its semi jog around Earth in late September, after coming under the grips of Earth’s gravity and following a horseshoe-shaped path. By the time it returns next year, it will be moving too fast — more than double its speed from September — to hang around, said Raul de la Fuente Marcos.
NASA will track the asteroid for more than a week in January.
