LIVE: Artemis II crew expected to return to Earth
TL;DR
NASA's Artemis II crew aboard the Orion capsule "Integrity" prepares for Pacific splashdown off San Diego, executing a modified shorter entry trajectory to mitigate heat shield risks discovered during the uncrewed Artemis I mission, completing a 694,481-mile journey.
⏱️ Entry Sequence & Critical Milestones 4 insights
Final Trajectory Correction Burn
The RTC3 burn at 1:53 PM CT fires for 8 seconds to change velocity by 4.2 ft/s, precisely centering the spacecraft in the entry corridor.
Service Module Separation
At 6:33 PM CT, the European Service Module separates from the crew module, followed by a 19-second raise burn to optimize the angle of attack for atmospheric entry.
Atmospheric Entry and Blackout
Entry interface begins at 6:53 PM CT at 400,000 ft and 34,882 ft/s, initiating a 6-minute communications blackout caused by plasma buildup around the capsule.
Rapid Deceleration and Splashdown
From entry interface to splashdown at 7:07 PM CT, the vehicle decelerates from 23,783 mph to just 19 mph in 13.5 minutes using drogue and main parachutes.
🛡️ Heat Shield Safety Modifications 3 insights
Lofted Entry Profile
Mission controllers selected a 1,701-nautical-mile entry range and 14-minute duration rather than Artemis I's 3,178-mile skip entry to reduce thermal stress on the heat shield.
Char Liberation Prevention
The shorter trajectory prevents mechanical peeling of the heat shield material, which occurred on Artemis I when gas pressure built up beneath the porous char layer faster than it could escape.
Future Heat Shield Redesign
Artemis III will utilize redesigned, more porous heat shield material to enable safe skip entries returning from the lunar south pole without gas pressure buildup.
🚁 Pacific Recovery Operations 3 insights
Optimal Splashdown Conditions
The capsule targets splashdown off San Diego at 7:07 PM CT with favorable conditions including 10-knot winds, waves under 4 feet, and scattered clouds.
Crew Extraction Sequence
Navy recovery teams will extract Christina Cook first, followed by Victor Glover, Jeremy Hansen, and Commander Reed Wiseman, transporting them via dual helicopters to the USS John P. Murtha.
Post-Landing Safety Systems
The Crew Module Uprighting System inflates five helium airbags to ensure the capsule remains stable before recovery teams establish the "front porch" raft for safe crew extraction.
Bottom Line
NASA prioritized crew safety over mission efficiency by selecting a steeper, shorter entry trajectory to avoid the heat shield char liberation issues observed on Artemis I, demonstrating iterative risk management for deep space human flight.
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