NASA’s Planetary Radar Spots Its 1,000th Near-Earth Asteroid0
- From Around the Web, Space
- September 9, 2021
2021 PJ1, a near-Earth asteroid between 20 and 30 m (66-98 feet) across, safely flew past Earth on August 14, 2021 at a distance of over 1.7 million km (1 million miles). The approach was historic, marking the 1,000th near-Earth asteroid to be observed by NASA’s planetary radar in just over 50 years.