Oval shaped object gliding along tree top level.

I was in my yard with my telescope looking toward the North.  As I was looking through my scope, my mother came from around the house and got my attention.  She pointed toward the North.  We both observed an oval shaped object gliding silently along tree top level about 100 yards from our location.  Within seconds the object simple vanished.  
The object exhibited a bronze color.  The object held horizontal flight until it disappeared.  I was 11 years old at the time of the sighting.  My mom has since passed away.