Astronomers announced in January 2026 that they had found a 710-metre asteroid — nearly eight football fields across — spinning once every 1.88 minutes. A normal rubble-pile asteroid should tear itself apart at anything close to that speed, meaning 2025 MN45 must have internal strength comparable to solid rock.
Somewhere in the main asteroid belt, a body estimated to be 710 metres wide completes a full turn…
