China Plans to Strike Asteroid 2015 XF261 at Mach 26 by 2030

Mission Parameters and Target

The mission centers on the near-Earth asteroid 2015 XF261, a space rock estimated to be approximately 30 meters (98 feet) in diameter. Unlike NASA’s 2022 Double Asteroid Redirection Test (DART), which targeted a “rubble pile” moonlet called Dimorphos, Chinese researchers anticipate that 2015 XF261 is a solid object.

The CNSA plans to launch two spacecraft simultaneously on a single mission. After departing Earth, the pair will separate: the impactor will travel directly toward the target, while the observer spacecraft will follow a longer trajectory, potentially utilizing a gravity assist from Venus. The impactor is scheduled to strike 2015 XF261 at a velocity of more than 9 kilometers per second (5.6 miles per second)—a speed equivalent to more than 26 times the speed of sound at sea level—during a close approach to Earth in 2029 or 2030, when the asteroid is expected to be within approximately 7 million kilometers (4.3 million miles) of the planet.

Differentiating from NASA’s DART

While NASA’s DART mission successfully demonstrated kinetic impact as a viable deflection method, CNSA researchers argue that their proposed test represents a more realistic planetary defense scenario. In a study cited by Gizmodo, the team noted that DART changed a moonlet’s orbit around a parent asteroid but did not directly alter an asteroid’s trajectory relative to the Earth.

The Chinese mission aims to achieve four primary objectives: precisely striking the target, successfully deflecting its orbit, accurately measuring the results, and proving that the impact poses no threat to Earth. Because the extreme distance makes real-time control from Earth impossible, the final impact maneuvers will be performed autonomously by the spacecraft.

Scientific Objectives and Monitoring

The observer spacecraft is tasked with monitoring the asteroid’s orbit, shape, and surface conditions before, during, and after the collision. By carrying instruments such as cameras, spectrometers, and dust detectors, the probe will attempt to gather data on the asteroid’s internal structure, composition, and mechanical properties.

Scientists have identified 2015 XF261 as an ideal candidate due to its orbit, which is similar to Earth’s, and the predicted close flyby. However, the asteroid remains relatively mysterious; it has been observed only 74 times since its discovery, leaving researchers with limited information regarding its rotation and composition.

Evolution of Chinese Planetary Defense

The current plan for 2015 XF261 follows previous discussions regarding potential targets. In 2023, reports suggested the asteroid 2019 VL5 might be the target for a 2025 mission, while later reports in 2026 indicated 2016 WP8 had been identified for a potential December 2027 launch. According to Eurasiantimes, the criteria for selecting these targets involve factors such as orbital inclination, brightness for observation, and scientific value.

As noted by independent.co.uk, the urgency behind such testing stems from the potential for cataclysmic damage from asteroid impacts, historically illustrated by events like the 1908 Tunguska meteor and the 2013 Chelyabinsk airburst. If successful, the CNSA mission would provide a complete demonstration of planetary defense, integrating detection, deflection, and post-impact verification into one continuous campaign.