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National UFO Reporting Center
Sighting Report
Occurred : 1/6/2000 15:00 (Entered as : 1/6/2000 15:00)
Reported: 1/28/2000 21:18
Posted: 3/11/2003
Location: San Francisco, CA
Shape: Chevron
Duration:4 minutes
translucent, silvery boomerang shape, totally silent, with short, feathering discharge from the back edge

Am am a professor of sociology at San Francisco State University. I was walking my dog on the top of one of the bare hills in the city. It was a totally clear day. When I looked up in the sky there was a translucent silver boomerang shaped object overhead, discharing a regular undulating wave of something (not a contrail)which never chanaged in length. The discharge was along the entire back edge. It was totally silent. It appeared to be about as long (edge to edge) as a jetliner. I have no way of estimating how far away it was, but it was an absolutely clear day, and the object was clearly visible but earily silent. I continued to watch it move for about 3-4 minutes. Then the dog wandered away, and by the time I found her,(maybe three or four minutes) the object was no longer visible, despite the fact that there was considerable visibility from where I was watching.