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The OMOTENASHI team prepares their secondary payload for a ride on the SLS rocket during the Artemis I mission. If successful, OMOTENASHI will be the smallest spacecraft ever to land on the lunar surface and will mark Japan as the fourth nation to successfully land a craft on the Moon.

Three more secondary payloads that will travel to deep space on the Artemis I mission were integrated for launch July 23, and another is ready for installation at NASA’s Kennedy Space Center.

The satellites – called CubeSats – are roughly the size of a large shoe box and weigh no more than 30 pounds. Despite their small size, they enable science and technology experiments that may enhance understanding of the deep space environment, expand knowledge of the Moon, and demonstrate new technologies that could be used on future missions.

Outstanding Moon exploration Technologies demonstrated by NAno Semi-Hard Impactor, or OMOTENASHI, was developed by the Japan Aerospace Exploration Agency. OMOTENASHI is the only Artemis I secondary payload that will conduct a controlled landing on the Moon’s surface. Its primary objective is to test the technologies and trajectory maneuvers that allow a small lander to land on the Moon while keeping its systems – including power, communication, and propulsion – intact. Testing these systems around and on the Moon can help with development of similar small landers that could explore other planets. The spacecraft will also measure the radiation environment beyond low-Earth orbit, providing data that will help develop technologies to manage radiation exposure for human exploration. If successful, OMOTENASHI will be the smallest spacecraft ever to land on the lunar surface and will mark Japan as the fourth nation to successfully land on the Moon.

ArgoMoon, developed by Italian company Argotec and sponsored by Agenzia Spaziale Italiana, Italy’s national space agency, will perform autonomous visual-based proximity operations around the Interim Cryogenic Propulsion Stage, the in-space stage of the Space Launch System that provides the propulsion to send Orion on a lunar trajectory. The CubeSat will use high-definition cameras and advanced imaging software to record images of the stage and later of the Earth and the Moon for historical documentation, provide mission data on the deployment of other CubeSats, and test optical communication capabilities between the CubeSat and Earth. ArgoMoon will use a hybrid micropropulsion system that combines green mono-propellant and cold gas propulsion in a single system to provide attitude control and orbital maneuvering using a small amount of power.

The enhanced attitude capabilities are also used to run and validate artificial intelligence-based algorithms for autonomous Failure Detection, Isolation, and Recovery systems that perform continuous monitoring of the health of the satellite to detect any potential fault. In the case of fault detection, this service performs several operations to solve the problem. If the fault is not recoverable, the satellite goes in safe mode, which means that only the functionalities to keep the satellite alive and to communicate with ground are used.

ArgoMoon’s mission is a forerunner of technologies for deep space application that can be used for inspection of satellites not originally designed to be serviced, without the involvement of the gr ound segment.

BioSentinel is the only CubeSat that will contain a biological experiment on Artemis I and will be the first CubeSat to support biological research in deep space. It is being kept in a controlled environment at Kennedy. At a date closer to launch, it will be placed in the Orion stage adapter.

BioSentinel will be among the first studies of the biological response to space radiation outside low-Earth orbit in nearly 50 years. Its primary objective is to measure the impact of space radiation on living organisms – in this case, yeast – over long durations beyond low-Earth orbit.

Developed by NASA’s Ames Research Center, BioSentinel will enter an orbit around the Sun via a lunar flyby. The experiment will use yeast as a “living radiation detector” to evaluate the effects of ambient space radiation on biology. Human cells and yeast cells have many similar biological mechanisms, including DNA damage and repair.

Experiments using the BioSentinel instruments will also take place on the International Space Station and on the ground to demonstrate how varied amounts of radiation affect the yeast. While Earth-bound research has helped identify some of the potential effects of space radiation on living organisms, no terrestrial source can fully simulate the unique radiation environment of deep space. BioSentinel’s data will provide critical insight on the effects of deep space radiation on biology as NASA seeks to establish long-term human exploration of the Moon under Artemis and prepare for human exploration on Mars.

Seven other CubeSats were previously installed on the Orion stage adapter for the Space Launch System rocket’s first flight. The CubeSats will be deployed after SLS completes its primary mission, launching the Orion spacecraft on a trajectory toward the Moon.

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