Levitating ball discovered on a NASA photo on Mars

On July 2015, the ufologist Scott C. Waring has discovered a mysterious levitating ball over Mars on a photo caught by NASA. Is it UFO?

He explains:

I had to revisit this hovering orb, because I really thought that NASA would have deleted it by now, but its still there. I just checked it today and its still on the hillside. I have to admit I am a bit surprised that its still there. NASA has deleted some discoveries that I have posted in the past.

The original NASA photo is in False Color, so I put it into original color again. I don't know why NASA puts a false color filter (red) over many photos, but perhaps its to hide the fact that Mars is very similar to places on Earth.