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Chandrayaan-1 Now In Lunar Orbit

Date:
November 11, 2008
Source:
European Space Agency
Summary:
Chandrayaan-1, the Indian Space Research Organisation's lunar orbiter, was captured into orbit around the Moon on Nov. 8. One day later, the spacecraft performed a maneuver that lowered the closest point of its orbit down to 200 km from the Moon.

This image of Earth was taken by ISRO’s Chandrayaan-1 spacecraft while on its way to the Moon on 29 October 2008, at 08:00 CET (12:30 Indian local time). The image was obtained by the Terrain Mapping camera (TMC), one of the 11 instruments on board, and shows the Southern coast of Australia from a height of 70 000 km.
Credit: ISRO

Chandrayaan-1, the Indian Space Research Organisation’s (ISRO) lunar orbiter, was captured into orbit around the Moon on 8 November. One day later, the spacecraft performed a manoeuvre that lowered the closest point of its orbit down to 200 km from the Moon.

The spacecraft’s liquid-fuel propelled engine was fired at 12:21 CET (16:51 Indian Standard Time) when it was at a distance of about 500 km from the Moon. This reduced the spacecraft’s velocity, enabling the Moon’s gravitational field to capture Chandrayaan-1 into lunar orbit. In this configuration, the orbit’s point closest to the lunar surface was at 504 km and the spacecraft circled the Moon in 11 hours.

This lunar orbit insertion manoeuvre was executed from the Chandrayaan-1 Spacecraft Control Centre at ISRO’s Telemetry, Tracking and Command Network at Bangalore. The performance of all the systems on board Chandrayaan-1 was registered as normal.

Yesterday, at 15:33 CET (20:03 Indian Standard Time), the spacecraft’s engine was fired for about 57 seconds, reducing the orbit’s point closest to the lunar surface to 200 km while the farthest point remained unchanged at 7502 km. In this elliptical orbit, Chandrayaan-1 takes about ten and a half hours to circle the Moon once.

Over the next few days, the height of the spacecraft’s orbit around the Moon will be carefully reduced in steps to achieve a final 100-km polar lunar orbit. The Moon Impact Probe (MIP) will then be released to hit the lunar surface, after which the other instruments on board will be turned on.

Chandrayaan-1 was launched on 22 October by from India’s spaceport at Satish Dhawan Space Centre SHAR, Sriharikota. The launcher placed the spacecraft in an elliptical orbit around Earth.

In the past two weeks, the Terrain Mapping Camera (TMC), one of the eleven scientific instruments of the spacecraft, was successfully operated twice to take pictures.


Story Source:

The above story is based on materials provided by European Space Agency. Note: Materials may be edited for content and length.


Cite This Page:

European Space Agency. "Chandrayaan-1 Now In Lunar Orbit." ScienceDaily. ScienceDaily, 11 November 2008. <www.sciencedaily.com/releases/2008/11/081110153942.htm>.
European Space Agency. (2008, November 11). Chandrayaan-1 Now In Lunar Orbit. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2008/11/081110153942.htm
European Space Agency. "Chandrayaan-1 Now In Lunar Orbit." ScienceDaily. www.sciencedaily.com/releases/2008/11/081110153942.htm (accessed July 29, 2014).

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