My brothers farmed after dark, they told my mother, my mother started yelling for the kids to run out to see it. It was located in our field across the road.

I was approx 11 years old, but remember running out with mother, we stood 400 ft from it, it was the size of  a large round  above ground swimming pool, it had lights going around looking like port-holes.   
We watched it for 30 minutes, it made no sound.  I don't remember anything more.   We told no one of it happening.  I asked mother why we didn't report it, she said people would think we were crazy.
My twin brothers who were farming,  17 years old, may have been harmed.  They became sick afterwards, were  admitted to the mental hospital remained the rest of their life, until their death.  I have always been plagued by this.     
I listen to coast to coast show, so I am sending this in due to your request.  
I have a Master's Degree in education and thank you for your work.
Witness indicates that the date of the sighting is approximate.  PD