We were stargazing in the backyard, facing East.
Before the sighting we saw a satellite and a regular commercial airplane. Then, we saw a triangular shaped object traveling southeast.
It was moving faster than an airplane. It was similar to an isosceles triangle, the 2 longest sides were lined with at least 6 lights each and the shortest side appeared dark/transparent. It appeared to be as large as 2½ moons. It was silently traveling low in the horizon.