Just out of curiosity, I wanted to extract the detail of Fobos from the previous image (see https://www.facebook.com/PianetaMarte.MdM/posts/2665892673493909), to enlarge and process it.
Basically I subtracted the sky from the balanced image to verify the color of Fobos, also to verify the color balance that I normally perform on all color photos of Curiosity that I publish on this page.
As you can see, the color of Fobos corresponds to the color shown in the color photos taken by the various probes, thus confirming the correctness of the color balance that I normally perform.
That said, even the blue color of the sky is correct!
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