At 2:23 on the morning of December 8, the Lunar 4 Lander and the Patrol (Lunar Rover) were successfully launched and began to move toward the back of the Moon, which will enable the first human soft landing and inspection on the back of the Moon.
On the afternoon of December 12, after about 110 hours of flying to the moon, the No. 4 detector reached the moon.
At 16:39, the scientific and technical personnel issued a command to implement the near-month braking at the Space Flight Control Center. On the 4th, the 7500 cattle engine was successfully ignited at 129 km from the moon, and the engine was shut down normally after about 5 minutes.
According to the monitoring and judgment of real-time telemetry data, the No. 4 detector successfully completed the "space brake", was captured by the moon, and entered the orbit of the moon about 100 kilometers in the near-month. The braking in recent months was a complete success.
Near-month braking is a key orbital control during the lunar probe flight. When flying near the moon, the detector brakes by deceleration, making its relative speed lower than the moon's escape speed, and thus captured by the moon's gravity.
Little known is that the No. 4 not only achieved on-time launch, accurate orbit, but also created a miracle.
According to the original plan, on the 4th, before the brakes in the near month, it was necessary to carry out three orbital corrections. The result was only performed once on December 9th, and the expected target was achieved.
In this way, the No. 4 can save considerable fuel, which is more conducive to subsequent tasks and extend the life of the equipment.
The fourth follow-up will also run in the orbit around the moon for a period of time, adjust the orbital altitude and inclination of the orbit, and conduct on-orbit testing with the relay star relay link and navigation sensor to ensure that the detector can finally enter the predetermined landing zone. And choose to implement a soft landing on the back of the moon.
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