2026 JH2 was first spotted last week by the Mount Lemmon Survey, an astronomical project based at the Mount Lemmon Observatory in the US state of Arizona.
It has been classified as a near-Earth asteroid and is set to get within around 50,000 miles of Earth when it flies past our planet on Monday evening.
That’s around a quarter of the distance between Earth and the Moon.
Experts think that 2026 JH2 is between 16 – 35 metres wide.
It is too faint to be seen with the human eye, but as it makes its closest approach to Earth, it should be visible through a telescope from some parts of the world.