Artemis II reaches its next critical phase in mere hours. Here’s what needs to go right.
NASA‘s Artemis II astronauts will get a quick reminder on their first day of flight that month The trip does not meet the sleeping requirements.
The historic human space shuttle, NASA’s first to pass through low-Earth orbit in more than 50 years, was launched from Cape Canaveral, Florida, Wednesday evening at 6:35 pm ET. But even after that lifting of the bones, the workers – Commander Reid Wisemanpilot Victor Glover, Christina Koch, and Jeremy Hansen — will have no time off.
First, the upper stage of the rocket sets in place Orion the spacecraft entered a high Earth orbit that takes about 24 hours to complete. As it orbits the planet, the crew will test life support, communication, and navigation systems while still close to home.
Then comes a strangely timed maneuver: the so-called “perigee rise” burn. Mission managers say this period of misconduct is in the same high-risk category as self-removal. The problem is when that engine burn should occur — during the astronaut’s sleep.
“Unfortunately, physics cannot be disproved,” said Jeff Radigan, the mission’s lead flight director. “We have to put them where we need to be to follow the path.”
What ‘home’ will look like for the Artemis 2 crew heading to the moon
For astronauts, that means a very long first day in an orbit that needs to burn midnight liquid hydrogen, so to speak. Their day started around 11:30 am ET on Wednesday, seven or so hours before the launch.
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Once in space, Wiseman and Glover will perform a maneuver demonstration of the spacecraft. They will use Orion’s spent upper stage – the Interim Cryogenic Propulsion Stage – to practice landing. Cameras and windows will help the couple see how the ship is handling when approaching and backing away.
Chief Training Officer Jacki Mahaffey oversees the Artemis II crew as they train for key maneuvers at the Orion spacecraft simulator in Houston, Texas.
Credit: NASA / Mark Sowa
Although manual control is not necessary for these missions, the test is an important indicator of whether the spacecraft can stop and the occupants on the ground in time. next month’s activities. After 1.5 hours of this test mission, Orion will fire up the engine for high-speed takeoff. The abandoned propulsion system will have a controlled collision in the Pacific Ocean.
About 8.5 hours into the flight, the astronauts will finally be allowed to get a glimpse. But it won’t last long: Just four hours later, they’ll get a wake-up call from Houston about that all-important perigee-raise engine burn.
Directing during one of the machine’s make-up or break times. It takes Orion’s first, short-term orbit and recalibrates it into a stable orbit before firing its moon-aligned engine scheduled for the next day.
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NASA had little control over time. The laws of orbital motion do. Orion has to fire up its engine periodically — not whenever it’s convenient — to get where it needs to go.
Rather than “bedtime,” Glover calls their first disturbed night what it really is.
“We’re going to take a nap,” she said.
When the job is done, the workers can crawl back into their sleeping bags attached to the walls – a luxurious 4.5 hours.
