I was in my backyard (downtown Noblesville Indiana) looking up at some pigeons flying around and noticed a dark spot in the sky thinking it was a balloon a kid let go. As I kept looking at this spot it moved directly over my yard and I then noticed the way it was flying was strange (not like a balloon) and it looked disc shaped. It was sunny outside with a mild breaze and some clouds to the East. I had my son bring me binoculars and I zoomed in on the object as it slowly flew over my yard from West to East and I clearly saw a black disc shaped object with triangles all around the edge, like a star pattern. It was rotating slowly but appeared damaged as it was wobbly rotating but in a consistent pattern. It definitely was not a balloon. It was low enough to see it with my naked eyes and my neighbor came out and by that time it was too far away for him to see. It appeared to go into the clouds from a distance. I got into my car to try and follow it but could not see it due to clouds. I felt amazed at what I saw, disappointed my neighbor could not see it, but my son saw it too.