Asteroid 2025 Gj21. That's because the space rock is 2.3 kilometres wide, which makes it larger than. Less than two days later, a second large asteroid is sweeping past earth.
The very small asteroid 2025 gj2 has a close encounter with earth on 11 april 2025. Nasa used one telescope to transmit the radio waves, and a second one to receive them, resulting in images of 2025 mk that include not just the shape of the asteroid, but bumps, divots, boulders, and ridges.