lunartime.org

Mission

Artemis III

Planned, run by NASA. Window as our sources word it: 2027.

At a glance

Every value in this table comes from the entry in our missions registry; the window is printed in the words of the source, never converted into a date of our own.
FieldValue
OperatorNASA
StatusPlanned
Window2027
Address we linkwww.nasa.gov
Partners named in our sourcesNone
Documents on this site1 document
Papers on this siteNone yet
Facts on this page4, each with its own source

Key facts

  • NASA's architecture update of 27 February 2026 makes Artemis III a test flight in low Earth orbit in 2027. [1]Official
  • The same update adds a mission to the Artemis programme and moves the first crewed landing to Artemis IV in 2028. [1]Official
  • A White House memorandum of 2 April 2024 gives NASA until 31 December 2026 to deliver a finalized lunar time implementation strategy. [2]Official
  • NASA's announcement of the lunar time work quotes a model figure of about 56 microseconds per day for a lunar clock against an Earth clock. [3]Official

In short

Artemis III is the flight NASA moved into low Earth orbit. The architecture update of 27 February 2026 adds a mission to the programme, makes this one a test in 2027 and moves the first crewed landing to Artemis IV. The address on this page is that update, because our registry holds no mission page of its own. Which time scale the flight would use is not stated anywhere in the registry: the United States strategy for lunar time is not due until the end of 2026.

Every clock value on this site is a model value computed from published rate figures: no lunar time scale has been realized, and nothing on this page is a reading taken from a clock on the Moon[4]. The record itself sits inthe list of missions, its operator has a record of its own in National Aeronautics and Space Administration, and what a microsecond is worth in metres is inwhy microseconds matter.

Each point in the section below rests on a source listed at the foot of this page; where the point is our own arithmetic rather than someone else's document, it says so and the model is set out inhow we calculate lunar time.

Why time matters here

  1. The 2024 White House memorandum requires four features of any new celestial time standard, and the first of them is traceability to Coordinated Universal Time.
  2. The same memorandum states that NASA will determine the schedule and implementation of lunar time deployment from the requirements of expected missions, so flights set the timetable.
  3. A clock offset is a distance: by our own arithmetic one microsecond of timing error is 299.79 m of light path, and the model behind that number is on our methodology page.

Where this record connects

Operator

Documents

Other missions

Sources

  1. NASA Adds Mission to Artemis Lunar Program, Updates Architecture — NASA, . Official document. Verified .
  2. Policy on Celestial Time Standardization — White House Office of Science and Technology Policy, . Official document. Verified .
  3. NASA to Develop Lunar Time Standard for Exploration Initiatives — NASA, . Official document. Verified .
  4. Our calculation: the lunartime.org clock model — Lunartime Editorial, . Our calculation. Verified .

Last verified