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National UFO Reporting Center
Sighting Report
Occurred : 12/21/1999 13:30 (Entered as : 12/21/99 13:30)
Reported: 1/30/2000 04:26
Posted: 2/11/2003
Location: Seatac, WA
Shape: Sphere
Duration:30 seconds
Metalic silver sphere at a height of about 500-700 ft. up roughly 6-8 miles from me over the area of Southcenter Mall near Seatac airport.

I am a 34 YO apartment manager and small business owner living in Seattle. My father is a retired U.S. Air Force Lt. Col. fighter pilot, so I have quite a bit of knowledge when it comes to things flying in the skies due to his shared experiences and the many hours of spending time at USAF bases and air shows with him. On Tuesday, December 21st at approximately 3:30 in the afternoon, I was driving alone southbound on Interstate 5 just past downtown Seattle and noticed a silverish-grey, spherical metallic object hovering in the sky at what I would guess to be at a height of about 500-700 ft. up and at a distance from me at around 6-8 miles in the southern sky (over the Southcenter Mall area). If I were to put my hand at arms length, it would have been just slightly smaller than my thumbnail. It moved up and down several times...not like a balloon does in a floating manner with a wind, but moving up, stopping for a second, then moving down then stopping. It did this several times then went from left to right a few times in the same manner. The area it covered in these maneuvers would be maybe 30-40 ft? (probably about an area the size of my fist at arms length) Then it seemed to shrink in on itself and just vanished completely. There were a few passenger aircraft in the sky due to it's close proximity to SeaTac International Airport, but nothing close enough that it would have been a danger...at least not during the time I witnessed it. Total time from the moment I saw it until it vanished was about 30 seconds.