If you were hoping to see the “mini moon,” you’ve probably been disappointed. But experts say the asteroid was an important milestone in planetary defense research.

A small asteroid called 2024 PT5 will temporarily orbit Earth this fall. Here's what it looks like and whether it will be visible to the naked eye.

Though it can't be seen with the naked eye or binoculars or a home telescope, but it can be visible to professional equipment because of its small size and made of dull rock.