NASA has provided preliminary operational details for the Artemis III mission, confirming the 2027 flight will serve as a low Earth orbit (LEO) demonstration of rendezvous and docking procedures with commercial lunar landers.
Following the agency’s recent architectural pivot to delay a crewed lunar surface landing until Artemis IV in 2028, Artemis III is now tasked with mitigating the technical risks associated with coordinating multiple spacecraft in orbit. The flight will validate hardware from NASA, SpaceX, and Blue Origin prior to deep space deployment.
To maintain consistency with the Space Launch System (SLS) Block 1 configuration used for lunar missions, Artemis III will launch without a functional upper propulsion stage. Instead, engineers at the Marshall Space Flight Center are fabricating a structural “spacer.” This component replicates the mass, dimensions, and interface points of the standard upper stage but lacks propulsion capabilities. Once the SLS delivers the stack to space, the Orion spacecraft’s European Service Module will circularize the vehicle’s orbit.
According to NASA, operating in LEO rather than lunar orbit expands the launch windows required to align the SLS launch with the deployment of SpaceX’s Starship and Blue Origin’s Blue Moon pathfinder vehicles.
“While this is a mission to Earth orbit, it is an important stepping stone to successfully landing on the Moon with Artemis IV. Artemis III is one of the most highly complex missions NASA has undertaken,” said Jeremy Parsons, acting assistant deputy administrator for NASA’s Exploration Systems Development Mission Directorate. “For the first time, NASA will coordinate a launch campaign involving multiple spacecraft integrating new capabilities into Artemis operations.”
During the flight, the four-person crew will spend an extended period aboard Orion to further evaluate the spacecraft’s life support systems. After executing the docking demonstration with the commercial landers, astronauts may enter at least one of the lander test articles. NASA is also evaluating options to test how Axiom Space’s AxEMU lunar spacesuits interface with the lander cabins.
The mission will conclude with Orion testing an upgraded heat shield upon reentry, which is designed to allow for more flexible reentry profiles on future missions.
Because the mission will remain in Earth orbit, the agency will not utilize the Deep Space Network. NASA is currently soliciting commercial industry input for alternative ground communication solutions during the flight and is accepting proposals for secondary CubeSat payloads to deploy in orbit.