NASA Artemis II Moon Rocket on Launch Pad | Kennedy Space Center
Engineers loaded more than 700,000 gallons of liquid propellant into the rocket, sent a closeout crew to the launch pad to demonstrate closing the Orion spacecraft’s hatches, and completed two runs of terminal count—the final phase of the launch countdown. The Artemis II crew also observed part of the test from the Launch Control Center at NASA Kennedy.
During the test, teams closely monitored liquid hydrogen fueling operations that proved challenging during previous tests. Hydrogen gas concentrations remained under allowable limits, giving engineers confidence in new seals installed in an interface used to route fuel to the rocket.
Early in fueling operations, teams experienced a loss of ground communications in the Launch Control Center. Operators temporarily moved to backup communication methods to maintain safe propellant loading activities before normal communications channels were restored. Engineers isolated the equipment that caused the issue.
While engineers review data from the test, the Artemis II crew is preparing to enter quarantine late Friday, Feb. 20, in Houston. Although NASA has not set a formal launch date, beginning the roughly 14-day quarantine to limit the crew’s exposure to illness before launch preserves flexibility in the March launch window.
Over the next several days, technicians will use cranes to set up temporary access platforms on the mobile launcher. The platforms will allow them to reach the upper left and right segments of the SLS solid rocket boosters and core stage intertank to service the flight termination system and retest it to meet Eastern Range safety requirements. The platforms were developed based on lessons learned during Artemis I and enable NASA to complete end-to-end testing of the safety system while at the launch pad rather than rolling back to the Vehicle Assembly Building at NASA Kennedy for retesting.
The closeout crew also will practice closeout operations once more, adding to the team’s proficiency.
Artemis II will pave the way for new U.S. crewed missions on the lunar surface in preparation to send the first astronauts to Mars.
https://www.nasa.gov/mission/artemis-ii/
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