NASA won't cancel Psyche asteroid mission, targets October 2023 launch

Artist's illustration showing NASA's Psyche probe approaching its asteroid namesake.
Artist's illustration showing NASA's Psyche probe approaching its asteroid namesake. (Image credit: NASA/JPL-Caltech/Arizona State Univ./Space Systems Loral/Peter Rubin)

NASA's Psyche asteroid mission has pulled its head off the chopping block.

The Psyche spacecraft was supposed to launch toward its namesake, a bizarre metallic space rock in the main asteroid belt, between August and October of this year. But issues with Psyche's flight software made it impossible to hit that window, leading NASA to announce in June that it had postponed the liftoff and initiated a "continuation/termination" review of the mission.

As that frightening term implies, cancellation was one possible outcome of the review, which was informed by a separate independent investigation commissioned by NASA and the agency's Jet Propulsion Laboratory (JPL) in Southern California, which manages the Psyche mission.

Those panels haven't completely wrapped up their work — the independent review team is still finalizing its report — but the verdict is in, and it's a good one for Psyche: NASA will continue developing the mission and now targets a launch in October 2023.

"I'm extremely proud of the Psyche team," JPL Director Laurie Leshin said in a statement on Friday (Oct. 28). "During this review, they have demonstrated significant progress already made toward the future launch date. I am confident in the plan moving forward and excited by the unique and important science this mission will return."

Related: The greatest asteroid missions of all time!

Psyche will still launch atop a SpaceX Falcon Heavy rocket from NASA's Kennedy Space Center in Florida, as previously planned. But the one-year delay will have consequences for the mission.

For example, a 2022 liftoff would have delivered Psyche to its asteroid target in early 2026. But a 2023 launch requires a different trajectory, pushing the arrival back to August 2029, NASA officials said.

And NASA's Janus smallsat mission, which is designed to study two separate binary asteroid systems, now may not ride to space with Psyche, as it would have on a 2022 launch. "NASA continues to assess options" for Janus, officials wrote in Friday's statement.

(Another ride-along, NASA's Deep Space Optical Communications, will definitely fly with Psyche in 2023; it's integrated into the asteroid probe.)

The delay could also have budgetary implications. The mission has a total life-cycle cost (including launch) of $985 million, $717 million of which had been spent by late June. Some belt-tightening might be needed to stretch the dollars over the extra years necessitated by the new plan.

An artist's concept depicts the 140-mile-wide (225 kilometers) asteroid Psyche, which lies in the main asteroid belt between Mars and Jupiter. (Image credit: NASA/JPL-Caltech/ASU)

Planetary scientists around the world are doubtless raising a glass to Friday's news, for it means they'll still get up-close looks at one of the most intriguing objects in the solar system.

Psyche is a 140-mile-wide (225 kilometers) asteroid that appears to be made mainly  of iron and nickel — a composition similar to that of Earth's core. Many researchers therefore think it may be the exposed heart of an ancient protoplanet, whose rocky layers were stripped away by powerful impacts over the eons.

"I appreciate the hard work of the independent review board and the JPL-led team toward mission success," Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate in Washington, said in the same statement.

"The lessons learned from Psyche will be implemented across our entire mission portfolio," he added. "I am excited about the science insights Psyche will provide during its lifetime and its promise to contribute to our understanding of our own planet's core."

 Mike Wall is the author of "Out There" (Grand Central Publishing, 2018; illustrated by Karl Tate), a book about the search for alien life. Follow him on Twitter @michaeldwall. Follow us on Twitter @Spacedotcom and on Facebook.

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Mike Wall
Senior Space Writer

Michael Wall is a Senior Space Writer with and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.