"Omotenashi also separated on November 16, but currently the CubeSat has not completed sun acquisition and communication is not stable. We are therefore continuing operations to stabilise attitude, secure power and establish communication," JAXA said in a statement.
On Thursday, NASA launched the first unmanned lunar mission, Artemis 1, with JAXA Omotenashi and Equuleus CubeSats on board. Equuleus separated on the same day and was confirmed to operate normally.
The Omotenashi satellite, weighing about 12 kilograms (26.4 pounds), should land the smallest lunar semi-rigid lander, which will observe the radiation situation on the Moon's surface.