China's Tianwen-1 Orbiter Captures Images of Interstellar Comet 3I/ATLAS
China's Tianwen-1 orbiter has successfully captured images of the interstellar comet 3I/ATLAS during its Mars flyby, providing valuable data on this rare celestial visitor.
China's Tianwen-1 orbiter has successfully captured images of the interstellar comet 3I/ATLAS during its Mars flyby in early October 2025. The spacecraft utilized its High-Resolution Imaging Camera (HiRIC) to photograph the comet from a distance of approximately 18 million miles (29 million kilometers). This operation was particularly challenging due to the need to track a faint, fast-moving object against a stellar backdrop.
The China National Space Administration (CNSA) stated that this was their first attempt to photograph such a distant and relatively dim target. The images reveal the comet's nucleus and surrounding coma, with a diameter reaching several thousand kilometers.
3I/ATLAS, the third confirmed interstellar object to pass through our solar system, was discovered on July 1, 2025, by the Asteroid Terrestrial-impact Last Alert System (ATLAS) in Rio Hurtado, Chile. The comet is traveling at approximately 129,800 mph (58 km/s) and is not expected to come closer than 1.8 astronomical units (about 170 million miles, or 270 million kilometers) to Earth, posing no threat.
The successful imaging of 3I/ATLAS by Tianwen-1 contributes valuable data to the study of interstellar objects, offering insights into the composition and behavior of celestial bodies originating from beyond our solar system.