Friday, 29 November 2013

'Mangalyaan Completes Last orbit Raising Manoeuvre'

The Mars Orbiter Mission (MOM) or Mangalyaan completed a fifth and last repositioning to take it almost two lakh km from Earth successfully on Saturday morning, Indian Space Research Organisation (Isro) said.                                            
Now, the spacecraft will brace itself for the next critical event on December 1 when it has to move out of the Earth's sphere of influence and move towards Mars.
India’s newly launched Mars orbiter, Mangalyaan, on Nov. 11 underperformed during the fourth of a planned six orbit-raising maneuvers necessary to boost the spacecraft out of Earth’s orbit and on its way to the red planet by Dec. 1, according to a statement from the Indian Space Research Organisation (ISRO).

Isro officials said the fifth-orbit raising manoeuvre started at 1:27 am, with a burn time of 243 seconds and an incremental velocity of 101.55 m/s. In the process, the 440N liquid engine raised the apogee from 118,642 km to 192,000 km.

The supplementary manoeuvre, which was completed by 5.10 am, added a velocity of 124.9 m/s to the spacecraft, it said.

During the orbit-raising operations conducted since November 7, Isro has been testing and exercising autonomy functions that are essential for Trans-Mars Injection (TMI) and Mars Orbit Insertion.

ISRO's PSLV C 25 successfully injected the 1,350-kg Mangalyaan Orbiter (Mars craft) into orbit around Earth some 44 minutes after a textbook launch at 2:38 PM from Satish Dhawan Space Centre at Sriharikota on Tuesday last, marking the successful completion of the first stage of the Rs 450-crore mission.

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