AI Overview
The Artemis II Orion capsule aligns itself for reentry using a combination of aerodynamic design, active guidance through small thrusters, and a controlled "skip entry" technique to manage heating and ensure a safe landing angle.
Key Aspects of Reentry Alignment:
Separation and Orientation: Prior to entering the atmosphere, the Crew Module separates from the Service Module, exposing the heat shield. Small reaction control thrusters are used to orient the capsule, placing the heat shield in the forward position.
Modified Skip Entry: Artemis II employs a "skip" maneuver, where the capsule dips into the upper atmosphere, rises slightly to radiate heat and reduce speed, then dives back down for a final, cooler landing. This prevents the intense heating associated with a single-pass, steep entry.
Lift Vector Steering: By rotating (rolling) the entire capsule, on-board computers adjust the direction of the "lift" generated by its shape.
To skip up: Lift is directed away from Earth.
To stay down: The capsule rolls 180 degrees to direct the lift toward the Earth, ensuring it stays within the atmosphere.
High-Precision Guidance: The reentry requires immense precision, as the flight path angle has a margin of less than one degree, necessitating precise, automated control to handle the 25,000 mph entry speed.
This process relies on atmospheric drag to slow the capsule down gradually to a speed where the parachutes can deploy safely.
