Sphere -30 min. - Stationary, bright object over Jet Factory -1954

I was a Design Engineer at Republic Aviation the year Colliers Mag. had a great series on space platforms, ect. I was called from lunch outside where a round, bright silvery object was directly overhead. I moved so it could be seen lined up with the edge of the factory roof (I wanted to see if it moved like a balloon). It did not move for over 10 min. I had to check a problrm on an F84F located about 1/2 mile away, drove there, entered cockpit & looked up. The object was still there. When I looked up a few Moments later the object was gone. One of my friends at the plant said it streaked NE over the horizon in a few seconds. He calculated various speeds at different altitudes - all fantastic. I was an AF B24 pilot a few years before & never before or since have seen what I would call a UFO.
Date may be approximate, although the witness does not indicate that fact.  PD