Metallic flying saucer over Locri, Calabria

On October 14, 2012, in Locri (located in the province of Reggio, southern Italy), an invisible UFO has been photographed. On image, we can see a possible metallic circular-shaped UFO. What is it?

Witness statement:

1. I was in the terrace.
2. I didn't notice the object. I saw it only few minutes after, at home, in the picture taken.
3. A UFO or something like that.
4. Nothing to say.
5. I was surprised to have been there in that moment, but I didn't hear nothing. No sound, no noise.
6. I realized I had framed and took a picture maybe of a UFO, only after seeing the photos at home.