UFO Sighting in Distrito de Lima, on 2017-07-09 14:31:00 - Dark ball

I was adjusting my camera to high quality and making test pics. only when i was in my pc i saw a dark ball inside the fog of the sky in lima (in the pic, in the middle, to the left). it was to the east of lima, a bit to the south. after and before this pics it is not possible to see the ball, just in one pic. i was taking some 15 pics each minute. i attach the original pic and a pic with contrast. today it was cloudy early in the morning and less cloudy at the time of the pic. no rain. the sun was going to the west.