The Artemis 1 flight to the moon will depend on precision rocket firings to pull off its complex trajectory.
Generating 8.8 million pounds of thrust at liftoff, the SLS rocket will propel Orion, its service module and the booster's upper stage into an initial orbit, one with a high point, or apogee, of about 1,100 miles and a low point, or perigee, of just 18 miles.
The SLS's two-hour lunar launch window is defined by a requirement for the ICPS to reach a point in space on the opposite side of Earth from the moon known as the antipode, where it can fire its engine to break out of Earth orbit and head for the moon. A half hour after the TLI engine firing, the Orion capsule will separate from the ICPS to fly on its own. From that point, the ICPS will continue toward the moon — deploying a dozen small scientific research satellites, called CubeSats, along the way — before thruster firings to head out into a"disposal" orbit around the sun.
"We're doing public affairs outreach where we maybe maneuver, do a selfie of Orion with the moon in the background or the or the Earth in the background," LaBrode said."We're going to try and catch the Earthrise. That's a spectacular image." If all goes according to plan, Orion will get back to Earth on October 10. Twenty minutes before atmospheric entry, the capsule will separate from its no-longer-needed service module and orient itself so its 16.5-foot-wide heat shield is facing the direction of travel.NASA
Orion will jettison a parachute bay cover at an altitude of 35,000 feet using 3 small chutes that will, in turn, pull out two 23-foot-wide drogue parachutes that will stabilize the spacecraft and help it slow down to about 130 mph.
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