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NASA Updates Artemis II Wet Dress Rehearsal, Launch Opportunities

NASA’s Artemis II SLS (Space Launch System) rocket with the Orion spacecraft atop a mobile launcher is seen at Launch Complex 39B, Thursday, Jan. 29, 2026, at NASA’s Kennedy Space Center in Florida. The Artemis II test flight will take Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, and Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), around the Moon and back to Earth.
NASA/Jim Ross

NASA is targeting Monday, Feb. 2, as the tanking day for the upcoming Artemis II wet dress rehearsal at the agency’s Kennedy Space Center in Florida, as a result of weather. With this change, the first potential opportunity to launch is no earlier than Sunday, Feb. 8.

Over the past several days, engineers have been closely monitoring conditions as cold weather and winds move through Florida. Managers have assessed hardware capabilities against the projected forecast given the rare arctic outbreak affecting the state and decided to change the timeline. Teams and preparations at the launch pad remain ready for the wet dress rehearsal. However, adjusting the timeline for the test will position NASA for success during the rehearsal, as the expected weather this weekend would violate launch conditions.

While NASA will wait to set a launch date until teams have reviewed the outcome of the wet dress rehearsal, Friday, Feb. 6, and Saturday, Feb. 7, are no longer viable opportunities. Any additional delays would result in a day for day change. 

The Artemis II crew remains in quarantine in Houston. Managers are assessing the timeline for crew arrival.

The opening of a simulated launch window during the wet dress rehearsal begins at 9 p.m. EST, Feb. 2, with the countdown beginning approximately 49 hours prior. NASA will continue to assess weather conditions ahead of the test.

During the current cold weather, engineers have kept Orion powered and have configured its heaters for the colder temperatures. Purges, used to maintain proper environmental conditions for elements of the spacecraft and rocket, including the booster aft skirts, are also configured for the weather.

A 24/7 live stream of the rocket at the launch pad remains online. NASA will provide a separate feed planned to capture wet dress activities. The agency also will provide real-time blog updates regarding the test during fueling.  

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