Walking my dog same time same route. As I got to the corner ready to cross the street I heard an airplane. I looked up to see the plane as it passed over head. I was startled by a cigar shaped object hovering over the trees to the north east. If I'd had a rock I could of hit it. The object was 10 feet above the trees and very large it was reflective like a metallic mirror on it's south side facing the sun. It was reflecting the sky. I looked back to the airplane an then I looked back at the object and realized this object was silent an seamless. Nothing no Windows, no undercarriage or wings an no strings it was smooth like glass. The silence scared me. I watched it for several minutes until it slowly moved away to the east an disappeared. I didn't know what I saw. I just know what I did not see.