Russia confirmed that the crash of Lunar 25 was mainly due to engine failure, and the ignition time was increased by 43 seconds.

CTOnews.com, August 21, the Russian Luna-25 probe was originally scheduled to make a landing attempt around August 21, but deviated from the design orbit and collided with the moon because "during the operation, there was an emergency on the automatic station and could not maneuver according to the specified parameters."

Yuri Borissov, director of the Russian Federal Space Agency, recently said that the main reason for the Luna-25 moon collision was the abnormal operation of the propulsion system, which eventually led it into an "incomplete lunar orbit."

▲ source: to put it simply, the Luna-25 engine is scheduled to work for 84 seconds during the orbit change, but the actual ignition time is as long as 127. it is this extra 43 seconds that caused it to crash into the moon.

"the engine needed to be redirected before the adjustment was made, and the engine was started at 14:10, which was a measure taken to adjust the attitude and put the device into the pre-landing orbit. Unfortunately, the engine did not shut down as expected," he said in an interview with the television channel Russia-24.

The head of the Russian space agency said: "the actual working time (of the engine) is not 84 seconds as originally planned, but 127 seconds. This is the main cause of the accident of the device."

He added that before going to heaven, they had simulated several orbit correction missions on the ground station, but although the radio communication was stable and the location of the equipment was determined, however, due to the interruption of communication with the equipment, the prescribed parameter maneuver could not be carried out.

"the whole process was carried out in a stable radio communication area, and we were well aware of its location, but the connection was disconnected at 14: 57 and communication was not restored later. Preliminary orbital calculations show that due to the abnormal operation of the modified propulsion system, the device entered the open lunar orbit and crashed into the lunar surface," Borissov said.

"according to the preliminary analysis results, due to the deviation between the actual impulse parameters and the calculated values, the Luna-25 spacecraft deviated from the design orbit and collided with the lunar surface and no longer exists."