The object in the picture is NOT in a polar orbit, the existence of the picture itself proofs it. Quoting: Halcyon Dayz, FCD
Nonsense, polar and equatorial orbits can cross eachother.
Any object in a polar orbit would have swooped by at 7 klicks per second
It's a photographic screenshot, not a vid.
There are several pictures and they are more or less in focus, i.e. the object's orbit closely matches that of the Orbiter.
Most parsimonious explanation is that the object is something that came of the Orbiter.
I think it's rather small and close to the camera.
IOW space debris.
Just as the caption reads: [link to eol.jsc.nasa.gov
I think it's rather big and clicks away. If and when it's in a polar orbit is up for debate.