NASA’s Psyche Mission to Fly by Mars for Gravity Assist
By NASA
NASA’s Psyche spacecraft will get a boost from Mars on Friday, May 15, passing just 2,800 miles (4,500 kilometers) from the planet’s surface at some 12,333 mph (19,848 kph). The spacecraft will harness the planet’s gravitational pull to speed up and adjust its trajectory toward the metal-rich asteroid Psyche, one of the more unusual objects in our solar system.
Launched on October 13, 2023, the Psyche spacecraft relies on a solar-electric propulsion system and the inert gas xenon for propellant, gradually gaining speed over the course of its long journey. Psyche’s mission planners are using the Mars flyby to save propellant, letting the planet’s gravity do some of the work instead of the propulsion system alone. But gravity assists like these also offer opportunities for missions to practice and to calibrate their science instruments.