UFO Sighting in Saint Petersburg, Florida on October 17th 2015 – Observed a disc shaped or hat shaped object at about 5k feet at civil twilight, movement in straight line with no sound coming from the west south west moving south over the horizon in a straight line, until it disappeared within 5 minutes of sighting.

Observed a disc shaped or hat shaped like object very dark almost black against sun setting sky at about 5 thousand feet?, or 35 degrees above horizon, something like the size of a dime at the distance, moving in straight line with no sound, coming from the west south west moving south over the horizon until it disappeared within 5 minutes of sighting. It was not moving fast, its speed seemed to be slow and steady. Its shape was not that of any aircraft or bird in flight. Oct 17 2015 6:50pm -7:10pm. No other objects were in the sky, such as commercial aircraft. This is only my personal observation, no one was with me to corroborate.