White Egg shape being followed by aircraft

On Thursday 2/2/2023, I was driving west on County Hwy V in town of Vienna, WI. The sky was clear, I could see stars, other aircraft in the distance and radio tower lights in the distance. At approximately 18:25 hrs I saw a white oval shaped object that seemed to be glowing or had an almost fog appearance in the sky. The object was being followed by an aircraft that had red flashing lights on it. These aircraft/objects were just south of Dane WI headed in a northbound direction. I would estimate the size of the object was perhaps half of the size of the aircraft that was following. I was able to observe them until I lost sight of them. I was unable to follow them, as I was on the way to work. I believe they were no more than 500-100 yards apart. The two were approximate the height of normal aircraft, yet were travelling rather quickly. The sighting was only about 25-30 seconds to travel a rather large distance.