According to the officials, During 14 years of intrepid exploration across Mars, it advanced human knowledge by confirming that water once flowed on the red planet.
The robot has been missing since the U.S. space agency lost contact during a dust storm in June last year and was declared officially dead Wednesday.
NASA said it made its last attempt at contact Tuesday evening.
Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate told a news conference at mission headquarters in Pasadena, California, "I declare the Opportunity mission as complete,"
NASA Administrator Jim Bridenstine said in a statement, “It is because of trailblazing missions such as Opportunity that there will come a day when our brave astronauts walk on the surface of Mars.”