I was jogging home. I happened to look up and saw the reflective orb. At first thought it was a plane, but when I stopped to really look, I saw that it was nothing like a plane. I thought maybe a balloon since it was round and slightly reflective, but then I noticed that it was moving straight and steady and then stopped to hover. When I got home and took out my binoculars, I saw it had a bluish glow. I've never seen a balloon with a bluish glow inside! Also, it was almost 4 feet in diameter. I felt surprise, because I'd never seem anything like it and a little unnerved, because it was almost directly overhead and sort of hovering like it was watching. But it never did anything threatening or scary.