Vikram lander “hard landed” on the moon on Sept. 6 because of a problem with the lander’s braking thrusters.The first phase of descent was performed nominally from an altitude of 30 km to 7.4 km above the moon surface.The lander slowed from 1,683 meters per second to 146 meters per second during that time.During the second phase of descent, the reduction in velocity was more than the designed value,due to this deviation, the initial conditions at the start of the fine braking phase were beyond the designed parameters.As a result, Vikram hard landed within 500 m of the designated landing site.