United Launch Alliance (ULA), the prime contractor for the Space Launch System’s (SLS’s) Interim Cryogenic Propulsion Stage (ICPS), has declared the stage’s overall performance on the Artemis I mission as “perfect.”
The ICPS is the in-space upper stage of the SLS stack. On Artemis I, it was responsible for raising the initial orbital perigee and then performing the all-important translunar injection (TLI) burn to send Orion and the European Service Module duo on their way to the Moon.