At approximately 8:30 pm on 10/8/19 i went out on my east-facing balcony to get some fresh air. beautiful clear starlit night. i looked up and to my amazement, i saw a triangular-shaped black craft gliding silently coming from the north and heading south, about 5,000 feet up, at a distance of about a mile away. there was no sound, no lights, and no visible exhaust trail. my eyes were fixated on it. it appeared to be cloaked and blended into the night sky. because it was moving, i could see its shape as it blocked out the stars. i could see the underside and it appeared to be at least 200 feet on each of the 3 sides. i witnessed it for about 10 seconds before my vision was blocked by the south side of my building.