observer is a commercial pilot driving along the interstate highway. Object first appeared as a bright light (like a highway lightspot of 1/4 inch) but moving from ahead of the car (about 2 miles) towards a right sidewindowview (also 2 miles) at approx 1000 to 1,500 feet altitude (sky was overcast 1,500 to 2,000 feet with rain). First thought was ofcourse aircraftlandinglights but as object moved along it had no flashing (anticollision)lights whatsoever and appeared to be completely illuminated with a profile of a white to yellowish Mexican hat with slight orange kind of windowlike details on it. Size was about 1 inch. Object moved at a steady speed in about 20 seconds from front of the car to the right rearwards out of side at a steady speed. Highway was full of cars so there must be more witnesses! The 50.000 inhabitants town of shertogenbosch was about 5 miles away !