NASA TV UFOs:
Several UFOs Filmed during
the STS-48 Space Shuttle Mission

The unknown objects fly at different speeds. And it’s apparent that NASA pans the camera to the right to film one of the UFOs:

http://www.youtube.com/watch?v=B7UbFtlj-V0

The NASA STS-48 Space Shuttle Discovery mission:

Launch date: 12 September 1991 -
Landing date: 18 September 1991.