"PMA-3" Adapter

Orbital parameters:
- inclination (degrees)	51.6
- period (minutes)	89.8
- perigee (km)	181
- apogee (km)	349
Duration	788d.00h. (at December 09, 2002, 00h.00m. UT)
Distance (km)
Number of revolutions around Earth
Summary	PMA-3 (on bottom, nadir port of module "Unity" ) is for docking with spacecrafts Space Shuttle. Module Z1 and PMA (Pressured Mating Adaprer) were delivered into space with Space Shuttle "Discovery" (flight ISS-3A) and mounted on module "Unity" of ISS.

On Mar 24, 2017 Shane Kimbrough and Thomas Pesquet, during Exp.50, disconnected cables joining the PMA-3 docking unit to the Tranquility node. After the EVA, PMA-3 was removed from Node 3 and reinstalled on Node 2 on Mar 26, 2017.
PMA-3 (Pressurized Mating Adapter 3) is one of the most-relocated and least-used major components of the ISS. PMA-1 joins Unity to Zarya; PMA-2, originally at the other end of Unity, now is on the end of the Harmony module and was used for almost all Shuttle dockings. PMA-3 was used for only two dockings, STS-97 and STS-98 in 2000-2001. It was installed at Unity nadir on 2000 Oct 16 and the Canadarm-2 used to move it to new locations subsequently. In its new location it will be covered with one of the new International Docking Adapters, IDA-3, and used for Dragon-2 and Starliner dockings.
Moving history:
- 2000 Oct 16 Installed at Unity nadir
- 2001 Mar 11 Moved to Unity port
- 2007 Aug 30 Moved to Unity nadir
- 2009 Aug 7 Moved to Unity port
- 2010 Jan 23 Moved to Harmony zenith
- 2010 Feb 16 Moved to Tranquility aft (port)
- 2017 Mar 26 Moved to Harmony zenith
PMA-3 relocation during exp.50 in 2017

PMA-3 relocation

Ref.: #7(JR737), #21 - update: 11.08.17