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National UFO Reporting Center
Sighting Report
Occurred : 12/15/1998 03:30 (Entered as : 12/15/98 03:30)
Reported: 12/20/1998 18:45
Posted: 3/11/2003
Location: Petaluma, CA
Shape: Circle
Duration:1 second
Bright white disk, traveling rapidly in a straight line from Northwest to North toward the horizon.

The object appeared and immediately grew very bright (as bright as the brightest star in the sky) and about two and a half times as large as the biggest star seen in the sky. As soon as it had reached its maximum brightness, it moved in a straight line from the northwest, where it first appeared, to the north. Within about half to three quarters of a second it had gone behind a tree so I could no longer keep track of it. It was much too fast for an aeroplane or satellite, and considerably slower than a meteorite. I couldn't really tell its altitude. Its elevation started at about 40 degrees above the horizon and was at about 35 degrees when I lost sight of it.