[dr_lew]

Yes, and as a matter of fact, the mystery object is very near to that site, and is visible in at least two other images. It must be part of the same wreckage, but it doesn’t seem to be named or acknowledged in the NASA commentary. ( It does seem to a bear a resemblance to the “glider car” in the “These aren’t the droids you’re looking for” scene. )

I’m still investigating!

[Yossarian]

Yes, and as a matter of fact, the mystery object is very near to that site

Sorry, Curiosity is a very long distance from the Opportunity site. Perhaps Curiosity is seeing a discarded part of its own landing apparatus.

Please check out this map for reference: