I have enlarged this area of the photo as large as I can and have used auto-contrast and auto-color as well as several sharpening tools in Adobe Photoshop 7.0. The object appears in outline only but definitely seems to be solid and not an airplane or a bird. Distance is always difficult to judge but it looks several
thousand feet distant and a few hundred feet above the ground. If indeed it is much closer it could be a bird. This photo though is clear enough that if the object were a bird its tail would be observable. Same argument could be used if the object were an aircraft. Both Steve and I would like to know what you think. Please leave your comment below.