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Forum: Exploration: Moon to Mars
Topic: NASA's Artemis II mission (Orion/SLS)

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Message to Edit: HTML is ON UBB Code is ON Smilies Legend	Originally posted by Robert Pearlman on 04-01-2026 05:25 PM NASA release <blockquote><font size="+0">[b]Countdown enters terminal count[/b]</font> [list][b]T-10 minutes and counting[/b] []T-10M – GLS initiates terminal count []T-8M – Crew Access Arm retract []T-6M – GLS go for core stage tank pressurization []T-6M – Orion ascent pyros are armed []T-6M – Orion set to internal power []T-5M57S – Core stage LH2 terminate replenish []T-5M20S – LAS capability is available []T-5M20S – NTD lets commander knows LAS capability is available []T-4M40S – GLS go for LH2 high flow bleed check []T-4M30S – Flight termination system armed []T-4M – GLS is go for core stage auxiliary power unit (APU) start []T-4M – Core Stage APU starts []T-4M – Core stage LOX terminate replenish []T-3M30S – ICPS LOX terminate replenish []T-3M10S – GLS go for purge sequence 4 []T-2M02S – ICPS switches to internal battery power []T-2M – Booster switches to internal batter power []T-1M30S – Core stage switches to internal power []T-1M20S – ICPS enters terminal countdown mode []T-50S – ICPS LH2 terminate replenish []T-33S – GLS sends “go for automated launch sequencer” command []T-30S – Core stage flight computer to automated launching sequencer []T-12S – Hydrogen burn off igniters initiated []T-10S – GLS sends the command for core stage engine start []T-6.36S– RS-25 engines startup [b]T-0[/b] []Booster ignition, umbilical separation, and liftoff[/list]</blockquote>
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