A silent black triangular object with no lights moved over us as we walked our dog across a school playground.

My husband and I were walking the dog on a clear crisp October night when I looked at the eastern sky and spotted the little dipper. Suddenly I saw a shadow move in front of the little dipper and thought it was a flock of ducks or geese or something. Well I kept looking up at the sky and suddenly out of nowhere moving slowly from the northwest to the southeast right above us was a large black triangular shaped object blotting out the stars as it moved silently along. It eventually disappeared from view in the souteastern night sky. There were no lights and no sound.
Witness elects to remain totally anonymous;  provides no contact information.  PD