With NASA scheduling Artemis III for late 2027 as a critical low Earth orbit demonstration, track the latest rendezvous tests, commercial lander milestones, and SLS Block 1 progress. Explore the technical roadmap and multi-spacecraft operations required before the program targets lunar surface landings in 2028.
Artemis III LEO Test Flight Countdown
MISSION: LOW EARTH ORBIT REHEARSAL & LANDER TESTS
Current Target: Late 2027 (LEO Test Flight / Surface Landings in 2028)
Artemis III Mission Tracker: The Definitive Low Earth Orbit Test Roadmap
Humanity’s return to the lunar surface is the most complex engineering feat ever attempted. Following a major strategic restructuring by NASA, Artemis III has evolved into a vital low-Earth orbit (LEO) systems integration and dual-lander demonstration mission scheduled for late 2027, paving the way for the historic crewed lunar landings on Artemis IV in 2028.
This mission will serve as an unprecedented orbital rehearsal, executing high-precision rendezvous and docking maneuvers between the Orion spacecraft and commercial human landing system test articles from both SpaceX and Blue Origin. By validating these critical multi-spacecraft operations and software handovers close to home, NASA is ensuring maximum safety before the program sets its sights on landing the first woman and person of color on the lunar surface.
The 2027 Strategy: Why NASA Shifted to a Low Earth Orbit Demonstration
Following the succesful completion of Artemis II, NASA strategically restructured the mission sequence. Artemis III has transitioned into a vital low-Earth orbit (LEO) systems integration and dual-lander test flight scheduled for late 2027, paving the way for the first crewed lunar landing on Artemis IV in 2028. Several key factors drove this strategic pivot:
- Commercial Lander Integration: Rather than heading straight for the lunar surface, Artemis III will execute a complex multi-spacecraft operations campaign in LEO. The four-person crew aboard Orion will perform precision rendezvous, proximity operations, and docking tests with both SpaceX's Starship HLS and Blue Origin's Blue Moon lander test articles.
- Axiom Spacesuits and System Handovers: The mission serves as a critical operational dress rehearsal, allowing flight controllers and crews to validate software handovers, vehicle control dynamics, and next-generation xEMU spacesuit interfaces close to home.
- Orion Heat Shield Refinements: Engineers have successfully integrated upgraded thermal protection design changes based on meticulous post-flight data analysis from Artemis I and II, ensuring optimal safety for high-velocity entry profiles.
The Role of SpaceX Starship HLS (Human Landing System)
Artemis III relies on a unique architecture where NASA's SLS rocket launches the crew, but SpaceX's Starship lands them.
The Orbital Refueling Challenge
To reach the Moon, the Starship HLS must be refueled in Low Earth Orbit (LEO). This requires approximately 10-12 "tanker" Starship launches.
- Propellant Depot: A specialized Starship remains in orbit as a storage tank.
- Tanker Flights: Multiple Starships launch to fill the depot.
- HLS Docking: The lunar lander docks with the depot to "fill up" before heading to the Moon.
Artemis Landing Sites: The Quest for Lunar Water
NASA has identified 9 candidate regions near the lunar South Pole. These sites are selected for their "Peaks of Eternal Light" (for solar power) and proximity to "Permanently Shadowed Regions" (for water ice).
Scientific Priorities
- Cryogenic Sampling: Collecting ice samples that have been frozen for billions of years.
- Deployment of the LTV: Setting the stage for the Lunar Terrain Vehicle, which will allow astronauts to explore kilometers away from the landing site.
| Target Date | Milestone | Mission Criticality |
|---|---|---|
| March 2026 | Artemis II Launch (Crewed Flyby) - Completed | Success |
| Mid 2026 | Starship Orbital Propellant Transfer Demo | Critical |
| Late 2026 | Axiom Space Suit (xEMU) CDR Review | Medium |
| Late 2027 | Artemis III LEO Test Flight & Dual Lander Docking | Mandatory |
| 2028+ | Artemis IV & V Crewed Lunar Surface Landings | Final Goal |
*Data updated based on NASA's restructured mission planning cycle and LEO demonstration strategy.
NASA is officially targeting late 2027. However, the mission profile has fundamentally changed: instead of a lunar landing, Artemis III will be a complex Low Earth Orbit (LEO) test flight to demonstrate critical rendezvous, docking, and systems integration between Orion and the commercial lander test articles.
To ensure maximum crew safety and system readiness, NASA inserted an Earth-orbit dress rehearsal. The immense complexities of orbital refueling for Starship, the integration of new Axiom spacesuits (xEMU), and necessary Orion heat shield refinements made a LEO test flight the safest path forward before attempting a lunar landing.
While the specific crew assignments will be announced closer to launch, NASA remains committed that the first crewed landing—now slated for Artemis IV in 2028 or beyond—will include the first woman and the first person of color to walk on the lunar surface.
No. Because Artemis III is now a systems integration test, it will involve direct docking operations between Orion and the commercial landers (Starship HLS and Blue Moon) entirely within Low Earth Orbit. The Lunar Gateway will be utilized during the actual lunar landing missions starting with Artemis IV.
NASA requires SpaceX to prove that Starship can land safely on the rugged lunar South Pole without humans on board before risking a crewed mission. This mandatory uncrewed surface demonstration will act as a critical prerequisite for the Artemis IV crewed landing.
Even as a LEO demonstration, it is a highly complex, multi-launch campaign. It requires one SLS launch to carry the crew in Orion, alongside multiple commercial launches to stage the Starship HLS and Blue Moon test articles in Earth orbit for the docking rehearsals.