NASA Mars Exploration Rover Status Report, October 5, 2018:No signal from Opportunity has been heard since Sol 5111 (June 10, 2018).
It is expected that Opportunity has experienced a low-power fault, a mission clock fault and an up-loss timer fault. The dust storm on Mars continues to abate with atmospheric opacity (tau) over the rover site around 1.1.
The project has been listening for the rover over a broad range of times using the Deep Space Network (DSN) Radio Science Receiver and commanding “sweep and beeps” throughout their daily DSN pass to address a possible complexity with certain conditions within the mission clock fault… [More at link]