In the fifth and last orbit-raising maneuver, the spacecraft’s 440 Newton liquid-fuel propelled engine was fired for about two and a half minutes. The lunar transfer orbit’s farthest point from Earth is about 380 000 km.
The spacecraft, which is being monitored from the Spacecraft Control Centre at the Indian Space Research Organisation’s ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bangalore, is working very well. Chandrayaan-1’s Terrain Mapping camera (TMC) was successfully tested on 29 October and provided its first images, depicting Earth.
After launch on 22 October, ISRO’s Chandrayaan-1 spacecraft was first injected into a highly elliptical 7-hr orbit around Earth, reaching between 255 km and 22 860 km above our planet. The spacecraft then spiralled outwards in increasingly elongated ellipses around Earth, until it reached its lunar transfer orbit on 4 November at 00:26 CET (04:56 Indian standard time). This transfer orbit’s farthest point from Earth is about 380 000 km. Credits: ISRO
Chandrayaan-1 will approach the Moon on 8 November 2008 when the spacecraft’s liquid-fuel propelled engine will be fired again. This manoeuvre, called lunar orbit insertion, will decelerate the spacecraft to allow the Moon’s gravity to capture it into an elliptical lunar orbit. A series of further maneuvers will then progressively lower the altitude of Chandrayaan-1 around the Moon until it reaches its final 100 km circular orbit.
The previous four orbit-raising maneuvers took place on 23, 25, 26 and 29 October 2008, respectively.
Chandrayaan-1, India’s first mission to venture beyond Earth’s orbit, is led by ISRO. ESA has coordinated and supported the provision of the three European instruments on board (C1XS, SARA, SIR-2), and assisted ISRO in areas such as flight dynamics and is supporting data archiving and processing. As a result of the collaboration, ESA and ISRO will share the data from their respective instruments. Other international partners in the mission include Bulgaria and the USA.