Actually, from my location I cannot see the image I assume has been posted to show this rover, but looking at that massive hirise image, I cannot find it. What we need in cases like this is a 'context' image as well as the image of the feature. The forum hosts images so why not use that feature and then link to the original like goggog has.
It might not be a rover, it could be for example, a spacecraft.
NASA discovers unidentified rover on Mars . Image taken by the MRO is showing an unkown rover in the Syrtis Major region. None of the European, Russian, Chinese or NASA rovers ever landed there.