My girlfriend and I went to the zoo on September 1, 2014. I gave my phone to a person at the zoo to take our picture. A few days later, I was going through the pictures from the zoo and I noticed the object. At first glance I thought it was a blimp. Once I magnified the object I was unable to identify it. It appears to be a pentagon turned on its side with a reflective glow around it. It’s shadow on the bottom is very dark. My girlfriend wanted to remain anonymous so I cropped her out of the image.