Photograph of a silver shape in the sky

I was hired to photograph the football team and one of the images has a silver sphere/disk shape in the sky. This is the only image with the shape. I have processed two versions with different sharpening settings to enhance the shape. The following photo in the series was taken 3 seconds later and the object is not anywhere in the frame. I can provide the original raw camera file for further investigation but it cannot be published. It has individuals whom I have photographed as part of my photography business and do not have any permission from the people in the photo. If you would like to see the raw file you may contact me via my email, your site doesn't allow for NEF file uploads. Thanks