"It is OK if it does not wake up because the rover has done what it was expected to do," ISRO chief S. Somanath told reporters late Wednesday, according to the Press Trust of India news agency.
ISRO said last week it had hoped to reestablish contact with the rover and the lander that safely delivered it.
"As of now, no signals have been received from them," it added.
The world's most populous nation has been steadily matching the achievements of established spacefaring powers at a fraction of their cost.
It has a comparatively low-budget space program, but one that has grown considerably in size and momentum since first sending a probe to orbit the moon in 2008.
Experts say India can keep costs low by copying and adapting existing technology, and thanks to an abundance of highly skilled engineers who earn a fraction of their foreign counterparts' wages.
India became the first Asian nation to put a craft into orbit around Mars in 2014 and is slated to launch a three-day crewed mission into the Earth's orbit by next year.
Earlier this month it launched a four-month mission towards the center of the solar system to study phenomena on the surface of the sun.
August's successful lunar mission came four years after its predecessor crashed on final descent, in what was seen at the time as a huge setback for its space program.
© 2023 AFP