Bright, yellow/orange circle, 10 ft. in diameter, silent, slow moving, 5mph, 50 ft. above ground-2 minutes, chased & threw rocks at it.

Myself, two younger brothers and two neighbor kids playing in the backyard on a Saturday morning. We saw a bright orange/yellow circle, approx. 10 ft in diameter, silently cruising about 50 feet above the ground. It was as bright as the sun. My younger brother asked me what it was. I told him it was the sun, although I knew it wasn't... at 8 years old, I had no other answer given my limited frame of reference.
They chased it, threw rocks at it. It drifted silently on it's course at about 5 mph, until it passed over our backyard and out of sight. It could have been in June of that year because it was warm that morning...perhaps the beginning of summer.
Date of sighting is approximate.  PD