Artemis II Secondary Payloads

Technicians install the Korea AeroSpace Administration (KASA) K-Rad Cube within the Orion stage adapter inside the Multi-Payload Processing Facility at NASA’s Kennedy Space Center in Florida on Tuesday, Sept. 2, 2025. The K-Rad Cube, about the size of a shoebox, is one of the CubeSats slated to fly on NASA’s Artemis II test flight in 2026. Deploying in high Earth orbit from a spacecraft adapter on NASA’s SLS (Space Launch System) rocket after Orion is safely flying on its own with its crew of four astronauts, K-Rad Cube will use a dosimeter made of material designed to mimic human tissue to measure space radiation and assess biological effects at various altitudes across the Van Allen radiation belts, a critical area of research for human presence at the Moon and Mars.