Light formation passes directly over 3 witnesses.

Myself and 2 of my neighbors were outside visiting and looking at the stars when I noticed 3 lights traveling Eastward in a triangular formation. They were very high up and moving quite slowly. At first We thought that it might be satalites but, they were moving much too slow and too perfectly aligned. The lights never changed in intensity, color or distance from each other. There was 1 in front and the other 2 were behind and to the sides. We could see stars pass through the formation as it moved, so I'm sure it was not a solid structure/craft with marker lights. We watched the formation until it went completely out of view to the East.
We suspect the witnesses may have been witness to the U. S. Navy triplet of "NOSS" satellites, which fly in formation.  PD