The object (UFO) was seen only after developing the photos of my vacation to Southern Utah. The photo was taken at Arches National Park at around 7:30 or 8:00 pm (not completely dark yet) when I stopped the car to take a picture of a beautiful rock formation with the almost full moon in the sky. I only noticed the object after the film from the vacation was developed, and even then, it took about 3 or 4 times looking at the photos to even spot it.There is only one object in the photo. It is positioned in the upper left-hand corner of the picture of rock formations and the almost full moon. It appears to be disk shape with the faint appearance of a dome. It appears to be gray or silver in color. It appears to have some type of illumuniation around the circumference. There were no sounds that caught my attention while taking the photo. The sky was very clear, without any clouds, and it was nearly dark. The weather was warm and comfortable.((NUFORC Note: We have requested a copy of the photo. PD))