Metallic object up close

As a child of nine or ten my father ,myself, and a friend,exsperienced a UFO that still puzzles me today,I'm 57 yrs old now and still this is vivid in my mind. We were running trot lines on the Wabash river, and noticed a object in the sky. This object came right over the top of us at tree top high maybe 30 ft. in the air with no sound was round in shape but had flats all over it approximatly 20ft. in dia. with four cylinder shaped bars coming out at the top and bottom eight in all. The craft was metallic looking as the color was the same as oxidized aluminum,it had what appeared to me to be a antena on top and bottom with a light on top and bottom, it followed the center of the river like a floating balloon staying the same hieght as the river changed course this object also changed course following the river until we lost sight of it.I have told very few people of this sighting because in 1959 or 1960 people would not have believed me ,and possible thought me to be unstable.I do not know what this craft was ,I do not know if it was something from earth ,or from some other planet, but I do know we seen it, it was real, and to this day have never seen anything like it since.I am a succesful business man ,that has been wondering what the heck it was for almost fifty years. I will most likely never know, other than it was a U.F.O.
Witness indicates that the date of the incident is approximate.  PD