Io Facility
The Io Facility was a top secret Starfleet Section 31 construction hangar located in orbit of the Jovian moon Io, at coordinates 23.17.46.11 in the Sol system. Shuttlecraft could enter the interior bay of the large enclosed drydock when panel sections on the side of the dock were rotated and moved out of the way. These craft ferried parts for a starship to at least one of twelve loading docks. 

The  starship  was constructed at the facility and launched in 2259, under the command of Admiral . Before the launch,  piloted a shuttlecraft into the interior of the facility, after Captain  asked him to investigate the hangar's spatial coordinates, supplied by . Scott was able to stow away aboard the USS Vengeance before it departed from the hangar. ()

Appendices

Background information 

The facility was only referred to as a "construction hangar" in the film, and the nearby bodies not explicitly identified. The name "Io Facility" derives from a non-canon Starfleet Top Secret Security Review, released as a tie in to the movie. Khan, in the guise of John Harrison, had been stationed there.  A concept illustration of the facility was made available. 

The black-colored hull of the construction facility proved difficult to light in space. Explained Co-Visual Effects Supervisor Pat Tubach, "Working with our art director Yanick Dusseault we came up with some concepts where we would pass him something and say what do you think we should be doing, how should we light the black hangar, where do we put the light? We know where the sun is, but that doesn’t really provide a very interesting frame, and you would get back images that were almost like models or miniatures lit in space, and you start to realize that’s what looks cinematic and good and meets with your expectations about the way you should be lighting something.”

Apocrypha 

According to the ization of , the facility's proximity to Jupiter's magnetosphere and Io's plasma torus caused spectrum distortions and upper hybrid resonance instabilities. These phenomena affected scanning and allowed Scott's shuttle to remain undetected by the facility.

The Io Facility is featured in the fourth issue of the comic Star Trek: Khan, in which Admiral Marcus and Lieutenant  used the station as a office to oversee Section 31 missions, Khan's projects, and the progress on the Vengeances construction.

External link 

fr:Installation d'Io (chronologie alternative)
Locations (alternate reality)
Space stations