First landing on an asteroid

On 12/02/2001, NASA’s NEAR Shoemaker spacecraft became the first human-made object to land on an asteroid when it touched down on 433 Eros, a near-Earth asteroid located approximately 33 kilometers in length. The landing followed a year-long orbital mission during which the spacecraft conducted detailed observations of the irregular, elongated body, often described as “potato-shaped.” The spacecraft descended to the surface near the south of the Himeros crater, in a region sometimes referred to as the “saddle.” Although NEAR Shoemaker had been designed as an orbiter and not a lander, mission engineers directed it toward a controlled descent at the end of its primary objectives. The touchdown occurred at a low velocity estimated between 1.5 and 1.9 meters per second, allowing the spacecraft to settle on the surface without damage. Following the landing, NEAR Shoemaker continued transmitting data back to Earth, exceeding expectations for a spacecraft not built for surface operations. NASA extended the mission for approximately two additional weeks, during which onboard instruments, including the gamma-ray spectrometer, collected data directly from the asteroid’s surface. The final signal from the spacecraft was received on 28/02/2001, marking the conclusion of the mission. The NEAR Shoemaker mission provided extensive information about the composition, geology, and structure of 433 Eros, including measurements of its mass, density, and surface features. The successful landing demonstrated the feasibility of controlled descents on small celestial bodies with low gravity, contributing to the planning of future asteroid exploration missions. Why This Moment Matters: The mission showed that a spacecraft designed for orbit could be guided to a controlled landing on a small body, providing direct surface data and informing later missions targeting asteroids and other low-gravity environments.