Flat black disc, no lights, spinning with a slight wobble, no sound

In 1977, my friend & his younger brother & I were walking through a field which is part of st Mary's Cemetary.  
My friend spotted the disk first.  We just stood there saying,"What is that?".  The disk was flat black in color and seemed to have a darker small circle in the center of the disk.  It appeared to spin in a clockwise or counter clockwise manner but would also wobble slightly.  
It made no sound, I'm not sure how high up this craft was, but I would estimate its size to the hole in the center of a compact disk. 
I saw this same disk years later at this field while watching New Albanys' football team practice there. I've often wondered if this was a weather balloon, experimental military aircraft, or aliens. 
I can honestly say I will never cease to wonder what it was that I saw during the blizzard of "77".
Witness indicates that the date of the incident is approximate.  PD