Fast moving, silent illuminated craft spotted of Green Bay Wisconsin.

4 MINUTES AGO ( 1:20 am central ) I was standing outside in front of my home letting my dog do his business on the east side Green Bay, WI.  I saw what appeared at a distance to be a Helicopter approaching from the west but as it neared I thought it was odd I heard no rotor noise, and it was moving fast I judged the height it was traveling at no more than 5000 feet but the speed was 3-4 times the speed of a helicopter maybe 400 - 500 miles per hour....as it approached from the west I saw what I thought were red & white lights but as it got closer then  passed over head the lights became subdued & virtually dark with a very subdued reddish color tone on the underside of the vehicle...it could see it cruise across the night sky heading east until it went out of sight...... this was NO man made aircraft...no jet noise, no air plane motor noise, no helicopter rotor noise, no white and red marker strobes on the wings & belly of the aircraft...... totally Silent,  low ceiling & moving between 400-500 miles per hour.