Artemis Sls Orion RolloutArtemis Update

Artemis II countdown and propellant loading for SLS

April 1, 2026The Launch Pad, Erik Kuna, Boeing Space

Multiple on-site updates track Artemis II tanking and countdown milestones, including core and upper stage cryogenic loading and terminal count readiness at Kennedy Space Center.

ARTEMIS II PROPELLANT LOADING UNDERWAY NASA Launch Director gave the "go" for tanking operations at 7:33 a.m. EDT.
NASA is GO for fueling. Launch Director Charlie Blackwell-Thompson gave the call at 7:33 AM. Crews are now chilling down the transfer lines and loading 756,000 gallons of liquid hydrogen and liquid oxygen into the SLS core stage and upper stage.
The core stage of the @NASAArtemis II SLS rocket is full with 196,000 gallons (741,941 liters) of liquid oxygen and 537,000 gallons (2M liters) of liquid hydrogen.
The ICPS, the upper stage of NASA’s Space Launch System rocket, is now in fast fill for its liquid oxygen tank and at flight levels for the liquid hydrogen tank. Core stage LH2 and LOX loading is complete.
The Launch Pad
Erik Kuna
Boeing Space
Spaceflight Now
NASA Artemis
Kennedy Space Center Visitor Complex
Jeff Foust
Stephen Clark
Phil Metzger
NSF - NASASpaceflight.com
countdownfuelingspace launch systemnasakennedy spacesls rocketnasa sls

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