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India to land near moon’s South Pole Sep 6

India to land near moon’s South Pole Sep 6
June 19
13:52 2019

BENGALURU: Embarking on its second voyage to the moon July 15, an Indian spacecraft and rover would land near the lunar south pole by September 6 or 7, a top has official.

“We will launch our second moon mission (Chandrayaan-2) on July 15 at 2.15 a.m., to land by September 6 or7 near the lunar south pole, where no one went so far,” Indian Space Research Organization (ISRO) Chairman K. Sivan told reporters here June 12.

The 3.8-tonne complex mission will have an orbiter with 8 scientific experiments, a lander with three experiments, a rover with two experiments and one passive experiment from the US space agency NASA.

“The orbiter with lander and rover will be launched onboard our advanced heavy rocket (GSLV Mark III) from the Sriharikota spaceport to inject it in the earth’s elliptical orbit at 170 km perigee (nearest to earth) and 30,000km apogee (farthest from earth) for cruising towards the moon over the next 16 days,” said Sivan.

Sriharikota is an island off the Bay of Bengal in Andhra Pradesh and about 80km northeast of Chennai.

The ambitious mission will make India the fourth nation after then Soviet Union (Russia), the US and China to land and ride on the moon to conduct various experiments on its orbit, on its surface, atmosphere and beneath.

The cost of Chandrayaan-2 mission is Rs 978 crore, including Rs 603 crore for the orbiter, lander, rover, navigation and ground support network and Rs 375 crore for the heavy rocket – Geo-stationary Satellite Launch Vehicle with an indigenous cryogenic engine.

ISRO has named the lander “Vikram”, after India’s space pioneer Vikram Sarabhai (1919-1971), and rover ‘Pragyan’, which in Sanskrit means wisdom.

“The rocket will place the orbiter in the geo-transfer orbit for its passage to the lunar orbit, covering 385,000km from earth to moon in 50 days for the lander to have a soft landing near its south pole,” said Sivan.

The lander will separate from the orbiter through manouvres, when it is at 150 km periloon (nearest the moon’s surface) and 18,000 apoloon (farthest from lunar surface) and land on the moon in four days after it (orbiter) enters the lunar orbit at 100 km from its surface and descends slowly up to 30 km for soft landing.

“The six-wheel rover will roll out of it (lander) in four hours after landing at a pre-determined site which is free from rocks and is between craters. It will roll 1 cm per second and speed up to cover 500 metres,” Sivan explained

The experiments (payloads) will be on the mineralogical and elemental studies of the lunar surface.

Interestingly, the lander as well as the rover will have the Indian national flag (Tricolour) painted on them. Ashoka Chakra will be imprinted on the rover’s wheels.

“The lander and rover will conduct experiments on one lunar day which is equivalent to 14 days on the earth,” Sivan pointed out.

The orbiter, which will revolve around moon for a year, will also map major elements on the lunar soil, study minerals, water molecules and generate a 3D map to study the lunar mineralogy.

The lander payloads will study moon-quakes near the landing site, moon’s thermal properties and measure the density and variation of lunar surface plasma.

Admitting that the mission was challenging for navigating to the moon and injecting the spacecraft (orbiter) into the lunar orbit at 100 km from its surface, Sivan said the soft-landing of the rover will be 15 terrifying minutes.

Outlining ISRO’s vision on space science and inter-planetary missions, Sivan said understanding secrets of the inner solar system was an aspiration of both national and international scientific communities.

Launching over a decade after India’s maiden moon mission Chandrayaan-1 in October 2008, Chandrayaan-2 has its own scientific objectives, challenges and benefits. IANS

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