"PMA-2" Adapter

Registration number of the module's delivery spacecraft	1998-069F / 25575
Time and date of launch (UT)	08h.35m. December 04, 1998
Launch site	Cape Canaveral, LC 39-A
Launch vehicle	Shuttle
Mass (kg)
Orbital parameters:
- inclination (degrees)	51.6
- period (minutes)	89.8
- perigee (km)	180
- apogee (km)	322
Date and time of the end of existance (UT)	Has been in flight at the moment of page updating
Duration	1465d.15h. (at December 09, 2002, 00h.00m. UT)
Distance (km)
Number of revolutions around Earth
Summary	PMA-2 (fore port) is for docking with spacecrafts Space Shuttle. American module "Unity" with 2 PMA (Pressured Mating Adaprer) was delivered into space with Space Shuttle "Endeavour" (flight ISS-2A).

The PMA-1 and PMA-2 adapters are detachable from Unity, but launched installed. Endeavour will unberth Unity from the bay using the RMS arm, and dock PMA-2 to the Orbiter Docking System. After rendezvous, the axial +Y port of Zarya will be attached to PMA-1. PMA-2 will be used as ISS's main Shuttle docking port; it will be moved from Unity to the Lab module when that is launched.
PMA-1 joins Unity to Zarya; PMA-2, originally at the other end of Unity, now (2017) 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 moved to the Harmoney zenith on Mar 26, 2017.

Ref.: #7(JR380,737), #21 - update: 26.07.17