Tamiami Executive airport, bright star moving at irregular speeds.As I walked to my bus stop to catch my shuttle to my aviation school, up in the distance from a southern direction about a 1/2 mile away from where I was, I noticed a very large bright white star .As I looked back up to look at this so called star, I noticed it was moving in a northerly direction toward me.As it moved Above me at about 500ft-1000ft. its speed reduce form about 60MPH to about 15MPH. it was extremely bright and it did not emit any sound what so ever. I believe that this UFO was the size of a Cessna model 401.And as it passed over me it kept in northerly direction it sped up to a to about 200MPH gradually over Tamiami executive airport, which is about a half mile form where I was at the moment and reside.And I lost sight of the craft in just a minutes in 10 mile visibility.I know that that object was no A/C of any known sort because it had no nav lights and it made no engine or jet noise.the time of the event was 5:49 am of 12/19/08. about half a mile away form KTMB.