bright small but bright silver/white spherical object zooming across the sky then simply disappearing

Winton Woods park, Cincinnati ohio. Unusually warm but windy Sunday in early October. Took a bike ride around the campground and then over the bridge headed to the upper part of park to have a snack and fly our kite on the hill overlooking the south walkway. We were both looking up at the kite when my partner said, Are you seeing this? and I responded, "Yes, I'm looking at it right now". Neither of us moved our heads or looked at each other while we conversed about what we were seeing - a small, perfectly spherical bright silver/white metallic object moving incredibly fast across the sky and then just disappearing into the blue sky. It was very easy to spot as the sky was a bright blue with no clouds in sight. The whole thing lasted maybe 5-8 seconds. Neither of us doubted that we had seen an object moving across the sky at an incredible speed. No sound heard. Went home and checked the space sites to see if there were any satellites passing over the sky at that time. Nothing reported.