Wet Dress Rehearsal Countdown Progressing for Artemis II

NASA continues to press ahead through the countdown for the Artemis II wet dress rehearsal – a fueling test of the SLS (Space Launch System) rocket. Teams monitored all systems throughout the overnight hours during cold temperatures and high winds at the agency’s Kennedy Space Center in Florida.

Early this morning, at approximately L-39 hours and 30 minutes, teams powered up the rocket’s core stage, which soon will be loaded with more than 700,000 gallons of liquid oxygen and liquid hydrogen during the tanking phase of the countdown. This will occur over a series of different propellant loading milestones to fill, top off, and replenish the tanks. The interim cryogenic propulsion stage was powered up overnight. Orion has remained powered over the last several days due to cold temperatures in Florida. Engineers are preparing to charge Orion’s flight batteries and soon will begin core stage battery charge. Later today, engineers will conduct final preparations of the umbilical arms and perform a walkdown at the launch pad.

A 24/7 live stream of the rocket at the pad continues online. NASA will provide a separate feed during tanking activities, as well as real-time blog post updates regarding the test during the fueling day.