But the Artemis 1 team is still analyzing data and considering options.
rocket, which will send an uncrewed Orion capsule on a long journey to lunar orbit and back.
Such thermal conditioning, achieved via the"bleeding" in of supercold liquid hydrogen propellant, ensures there's no shock when the engines light up, mission team members have explained. Engines 1, 2 and 4 got close to the mark during the countdown, but number 3 stayed relatively far out of bounds, at roughly minus 380 degrees Fahrenheit , John Honeycutt, manager of the SLS program at NASA’s Marshall Space Flight Center in Alabama, said during a news conference this evening.
"I think we understand the physics about how hydrogen performs, and the way the sensor is behaving doesn't line up with the physics of the situation," Honeycutt said during this evening's press conference. Readings from other sensors suggested that Engine 3 was getting appropriate levels of liquid hydrogen during the bleed, he added.
The team plans to make a few adjustments to the countdown plan — start the engine-cooling process 30 to 45 minutes earlier than last time, for example, And they'll continue analyzing data and mapping out scenarios over the next few days to make sure that the current approach is indeed justified and prudent, Honeycutt said.
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