India's first unmanned moon spacecraft, Chandrayaan-1 has entered the lunar transfer trajectory and is heading to an apogee of 3,80,000 KM as ISRO scientists on Tuesday carried the fifth and final orbit-raising manoeuvre.

"Chandrayaan-1 has entered the lunar transfer trajectory and is heading to an apogee of 3,80,000 KM, expected to happen on Saturday evening, the time at which the lunar orbit insertion manoeuvres are planned to be carried out," ISRO spokesperson S Satish said.

During the crucial manoeuvre today at 4.56 am, the spacecraft's 440 Newton liquid engine was fired for 145 seconds.

"Today's manoeuvre is one of the crucial and important milestones in the Chandrayaan-1 mission", Satish said.