Psyche Spacecraft Fires Up Its Sci-Fi-Worthy Thrusters
NASA Probe Heading to the Asteroid Belt
NASA’s Psyche spacecraft recently passed its six-month checkup with a clean bill of health, and navigators are now firing its futuristic-looking electric thrusters, which emit a blue glow, nearly nonstop as the orbiter travels farther into deep space.
The spacecraft launched from the Kennedy Space Center in Florida atop a SpaceX Falcon Heavy on Oct. 13, 2023. After leaving our atmosphere, Psyche made the most of its rocket boost and coasted beyond the orbit of Mars. For the next year, the spacecraft will be in what mission planners call “full cruise” mode, when its electric thrusters take over and propel the orbiter toward the asteroid belt. The thrusters work by expelling charged atoms, or ions, of xenon, emitting a brilliant blue glow that trails behind the spacecraft.
They are part of Psyche’s incredibly efficient solar electric propulsion system, which is powered by sunlight. The thrust created by the ionized xenon is gentle, but it does the job. Even in full cruise mode, the pressure exerted by the thrusters is about what you’d feel holding three quarters in your hand.
The orbiter is now more than 190 million miles away and moving at a clip of 23 miles per second, relative to Earth. That’s about 84,000 mph. Over time, with no atmospheric drag to slow it down, Psyche will accelerate to speeds of up to 124,000 mph.
The spacecraft will arrive at the metal-rich asteroid Psyche in 2029 and will make observations from orbit for about two years. The data it collects will help scientists better understand the formation of rocky planets with metallic cores, including Earth. Scientists have evidence that the asteroid, which is about 173 miles across at its widest point, may be the partial core of a planetesimal, the building block of an early planet.
Psyche is the 14th mission selected as part of NASA’s Discovery Program, which is managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama. NASA’s Launch Services Program, based at Kennedy, managed the launch service.