Lucy Trojan-Asteroid Spacecraft

NASA Lucy is an active interplanetary spacecraft launched in 2021 to fly by a record number of main-belt and Jupiter Trojan asteroids, including the 2025 Donaldjohanson encounter and planned Trojan encounters through 2033. NASA's spacecraft facts list a 1,500 kg wet mass, a 15.82 m width, a 7.28 m height with solar arrays deployed, a 3.95 m height with arrays stowed, and a 2.00 m body depth. The structured dimensions capture the deployed height and width; the stowed/depth qualifiers remain in this description because the current schema has no deployment-state or depth field. Lucy's installed dual-mode chemical propulsion subsystem combines hydrazine monopropellant attitude-control and trajectory-correction thrusters with hydrazine/nitrogen-tetroxide bipropellant main-engine capability.