Pirs (ISS module)

Pirs

The Pirs module attached to the International Space Station.
Module statistics
COSPAR ID	2001-041A
Launch date	14 September 2001, 23:34:55 UTC
Launch vehicle	Soyuz-U
Docked
Docking with ISS
Docking port	Zvezda nadir
Docking date	17 September 2001 01:05 UTC
Time docked	19 years, 10 months and 9 days
Reentry	26 July 2021, 14:51 UTC [1]
Mass	3,580 kg (7,890 lb)
Length	4.91 m (16.1 ft)
Diameter	2.55 m (8 ft 4 in)
Pressurised volume	13 m3 (460 cu ft)

Pirs (Russian: Пирс, meaning "pier") – also called Stykovochny Otsek 1 (SO-1; Russian: Стыковочный отсек, "docking module") and DC-1 (Docking Compartment 1) – was a Russian module on the International Space Station (ISS). Pirs was launched on 14 September 2001, and was located on the Zvezda module of the station. It provided the ISS with one docking port for Soyuz and Progress spacecraft, and allowed egress and ingress for spacewalks by cosmonauts using Russian Orlan space suits. Pirs was docked to Zvezda for almost 20 years, until 26 July 2021, where it was decommissioned and undocked by Progress MS-16 to make way for the new Nauka module.