It could have been obvious to anyone that reflections sometimes occur in images taken by cameras.
It could have been obvious that even a debutant ufologist would use words carefully when "things" on images could be just some reflections.
As with the infamous BLURFOS and so-called orbs, one of the most obvious criteria is whether the person who snapped the images saw something or not.
But this example of January 1, 2008, proves that it is by no means obvious to all ufologists:
http://ovniparanormal.over-blog.com/article-15175565.html
Thus, Catherine did not see anything in the sky, but for ufologist Christian Macé, this is a "mysterious UFO, appearing as a large pink luminous sphere!..."