Outside on balcony smoking cigarette. My cat suddenly looks out window very fast across the Neckar River and stares. I played with him a few seconds, but he wouldn't take his eyes off it. I turned around and saw a larger than commercial aircraft, v-shaped with bright white lights forming the V. It sat low enough and close enough to not be a plane. It hovered for about 30 seconds and then abruptky disappeared, nowhere to be seen in the sky for the next ten minutes I watched.((NUFORC Note: Source of the report elects to remain totally anonymous; provides no contact information. PD))