The lander of the Chandrayaan-2 spacecraft had made a hard landing on the moon as its velocity reduced during descent, the government told Parliament on Wednesday. The government said on November 21 throwing more light on ISRO’s dashed hopes of making a soft landing on the lunar surface in its maiden attempt.
Jitendra Singh, the minister of state in the Prime Minister’s officer, said the first phase of descent was performed from an altitude of 30 km to 7.4 km above the moon’s surface. The velocity was reduced to 146 metres per second.
During the second phase of descent, the reduction in velocity was more than the designed value. He said in a written reply to a question in the Lok Sabha. Due to this deviation, the initial conditions as the start of the fine braking phase were beyond the designed parameters.
Singh said most components of technology demonstration, including the launch, orbital critical manoeuvres, lander separation, de-boost and rough braking phase were successfully accomplished.
With regards to the scientist objectives, all the eight state-of-the-art scientific instruments of the orbiter are performing according to the design and providing valuable scientific data.
Data received from the orbiter was being provided continuously to the scientific community, he said. The indigeneously developed Chandrayaan-2 spacecraft comprising orbiter, lander and rover were successfully launched on-board the indigenous GSLV MK III-MI Mission on July 22.
After accomplishing four earth-bound manoeuvres and trans-lunar injection, the spacecraft was successfully insterted in the lunar orbit on August 20. A series of moon-bound manoeuvres were then carries out to achieve a Lunar orbit of 119x 127km.
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