2016-11-14 - Longmont, CO - Formation

11/14/2016 - 4-6 large white circles in two groups moving, disappearing and re-appearing and circling each other in the Eastern sky.

Driving east on Nelson Road at 8:45 PM and saw 2 groups of round, white circles to the East. Some were the same size and some were smaller in sized in each group. There were 3 circles in the group to the north at first, then 1 circle would drop down, then re-appear again quickly. There were 4 circles at first in the southernmost group. The number also varied from 2 large circles and 2 small circles that would move, reappear, then disappear. The two large circles seemed to rotate around each other. The circles disappeared from the sky, one by one, until only the last large circle was left. It was difficult to track the movement of the circles. Sometimes I could see them move, other times they just seemed to appear, then disappear. The was no sound.