The Roscosmos State Corporation has named the cause of the crash of the Luna-25 station. The accident could have occurred due to abnormal functioning of the on-board control system, as noted in the Roscosmos message.
“The most likely cause of the accident was the abnormal functioning of the on-board control complex, associated with the failure to turn on the accelerometer unit in the BIUS-L device (angular velocity measurement unit) due to the possible entry into one data array of commands with different priorities for their execution by the device,” the state corporation emphasized . They added that the distribution of teams in the data arrays is random.
As a result, due to an error in the on-board control complex when issuing a correction pulse, the moment at which the required speed was reached could not be recorded, just as it was not possible to timely shut down the Luna-25 propulsion system. The station’s propulsion system operated for 127 seconds instead of the planned 84, the station switched to an undesigned open orbit and collided with the lunar surface, the report noted.
Let us remind you that the first launch of the Russian lunar station in almost 50 years took place on August 11. “Luna-25”. On August 20, Roscosmos reported that contact with Luna-25 was lost – it switched to an off-design orbit and collided with the surface of the Moon. The mission is planned to be repeated in 2026.
Source: Rosbalt
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