I was out in my usual atar observation site. I am an amature astronomer with mikitary arcraft observation training. I heard a bird in my neighbors yard, it sounded startled. I looked up in that direction expecting a flock of gees. They are nousy and you can hear them honking at a quarter mile and at even at a thousand feet you can sometimes hear them flaping their wings.I heard nothing and from the time that i noticed and paid attention I counted nine seconds.In about the third second it was directly overhead. It seemed to reflect light from the neighborhood street lights for 2 seconds. After that I was able to follow it because it blocked stars, of which I am well familiar. The object did not accelerate or change course ,east to west. As I had no direct reference to size I can only speculate that if it was at 500 feet it would have been 125 feet across I am not saying that I saw aliens , but would sure like to know ---what the hay? I am willing to talk about this and other events that I have trust in the sources,local to my sight. Call me.