Up close account of a disk like object!

This report happened on my uncles farm in 1982 on a clear sunny summer day.
My cousin and I were outside the house hanging out talking when this dull carbon like disk appeared at the treeline in the east moving extremely slow toward us or west.
It stopped directly above us level with the two story house, this craft was not reflective about 30 feet in diameter and roughly 7 feet deep only in a span of 10 feet in the center of it.
This craft did not scare us just amazed us,it appeared to be monitoring us as well.
Perhaps a minute had passed and we ran to get my uncle and his camera, but he was napping and refused stating that it's probably a helicopter hauling steel to a mine.
This disk like craft made no sound whatsoever and was seamless with no lights-doors or exhaust ports.
Shortly after we got back outside it appeared to rotate slowly clockwise and crept away over the hill towards the west.
I don't know what exactly it was,but the composition of the metal seemed to absorb the sunlight and was too flawless to manufacture by men!
Witness indicates that the date of the incident is approximate.  PD