Silver stainless steel cigar shape, no engine or navigation, clearly visible, 500 yard up, watch leave orbit with bright star burst

Sitting in back yard talking with son. Looked up to my right to see stationary 5 block long by 2 blocks heigh silver cigar shaped object. Son turn and looked as I stood pointing at it. It had no seams, engine or navigation, no lights or markings, incredibly perfect stainless steel looking tube, rounded at both ends. Horizontal to ground along length, due south at 45 degrees up from my viewpoint, 400-500 yards up. Silently start moving east, slow at first, accelerating up and way doubling speed each second. It was quickly at satellite altitude, 1 minute or so. Continued straight towards edge of horizon. As it left atmosphere a bright burst of light, star burst like, caused us to squint and it was gone. It was still daylight, clearly visible and not far away at first siting. Everyone in Appleton should have seen. As it climbed and left orbit, everyone in the Midwest should have seen it. We both had cell phones in pocket but too mesmerized to even think about taking pictures. We do not consider it a UFO, but an alien spacecraft.