1. Standing near intersection of Peppertree Lane and Woodbrook Lane in Fallbrook. Observing to the West for Vandenburg Rocket Launch at 5:55 am.2. Observe Rocket for several seconds in WSW at about 45 degrees up in sky. The rocket disappeared and I noticed 3 lights, triangular, looking like 3rd magnitude stars moving slowly from west to east. They were maybe 40 degrees up and to my SSW. 3. The object moved very slowly and had no blinking lights. I thought is was a triangular UFO I had seen pictures of.4. The object in binoculars still appeared as lights looking like stars. As it moved East the 3 stars spread out to a front star and a small triangle trailing behind it about 1.5 moon diameters apart. It moved slowly for about 4 minutes then became dimmer. I lost it after it went behind a tree nearby.5. The object did not move or look like ans aircraft, too slow. The appearance came at the same time the Vandenburg rocket launch was occurring. I called my brother on the phone who also saw it from his location about 1 mile south of my location.6. The object just became dimmer and lower in the sky until I could not see it any more.