NASA's Lucy spacecraft has discovered a rare contact-binary satellite

Space · Published 23 October 2026 Swipe more like this →

In short: While en route to Jupiter's Trojan asteroids, the Lucy mission has already revealed a celestial anomaly. Scientists were stunned to find an oddly-shaped moon orbiting a tiny main-belt asteroid, marking the first time a contact-binary satellite has ever been detected.

The Lucy mission, managed by NASA, is currently navigating a complex trajectory through our solar system. Its primary objective is to investigate the Trojan asteroids, a massive swarm of ancient objects that orbit the sun in tandem with Jupiter. These asteroids are viewed by researchers as cosmic time capsules, potentially holding the chemical and structural secrets required to understand how our solar system first formed. This mission is part of NASA's broader scientific endeavor to uncover the universe's secrets and search for life beyond our planet. By studying these distant bodies, researchers hope to protect and improve life on Earth through advanced aeronautics and space research.

Before reaching its main destination, the spacecraft has already provided unexpected scientific insights. During its journey, Lucy visited the smallest known asteroid in the main belt. Upon arrival, the mission identified a moon with a highly unusual shape. This discovery is significant because it represents the first known instance of a contact-binary satellite ever found. This particular asteroid is noted for being the tiniest object within the main belt. The discovery was documented by researchers Edie Abrahams and video editor Frame Forge as part of the Astrum project.

A contact-binary is a type of celestial body formed when two separate objects collide and stick together, creating a single, elongated mass. Finding such a structure orbiting a tiny asteroid adds a new layer of complexity to our understanding of small-body dynamics. The spacecraft is scheduled to reach the Trojan swarm in 2027, where it will continue to search for clues regarding the composition and origins of these primordial rocks. The mission's upcoming arrival at the Trojan swarm will allow for deeper investigation into the composition of these ancient rocks. Scientists are eager to determine exactly where these primordial materials originated.

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