Were getting another moon. Sort of. Earth will have a second mini-moon in addition to its regular lunar companion for about two months starting on Sept. 29, according to a recent study published in the journal Research Notes of the American Astronomical Society.The second moon will actually be an Arjuna asteroid known as 2024 PT5, the study said. It will keep our main moon company until it returns home to an asteroid belt trailing our planet and the sun, scientists said.RELATED STORY | New Mars study suggests an ocean's worth of water may be hiding beneath the red dusty surfaceThe team behind the new study specializes in mini-moon events and said this isnt the first time this has happened. In fact, the study said it happens quite frequently, but the objects dont typically hang around long.There have been two other notable mini-moon occurrences, one in 1981 and one in 2022, the study said.But if youre hoping to see this mini-moon, good luck.Space.com spoke with the lead author of the study who said the mini-moon wont be visible with the naked eye or even amateur telescopes. Youll need a professional telescope (or a friend with a professional telescope) to see it yourself.