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.

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.

Earth's orbit will temporarily capture a mini moon - a tiny asteroid called Asteroid 2024 PT5. An astronomer tells whether we'll be able to see it.