Object had three white lights at each corner forming a triangle, estimated to be 1/2 degree separated. The lights were all of equal brightness and were estimated to match a first magnitude star. Object instantly appeared due north approximately 20 degrees above the horizon and immediately moved due west over a period of five seconds while remaining parallel to the horizon. It traveled a distance of 20 to 30 degrees of sky before vanishing. Rotating counterclockwise the entire time it was moving.