Indian Space Research Organisation (ISRO) said Chandrayaan-1 moon mission has been formally called off as the space agency has lost radio contact with the craft.

"We don't have contact with the spacecraft and we had to terminate the mission," ISRO chief G Madhavan Nair told reporters.

He, however, said the moon mission was a great success and 95 per cent of its objective was completed. "We could collect a large volume of data, including 70,000 images of the moon."

ISRO scientists, present along with Nair, said the spacecraft was hovering at 200 kms from the surface of the moon and it would take 1,000 days before it touches the lunar surface.

They said it was in discussion with the US and Russia to track the spacecraft.