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Poisk (ISS module)

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Poisk (ISS module)

Poisk docking module at the Space Station prior to the separation of its propulsion compartment

Poisk (Russian: По́иск; lit. Search), also known as the Mini-Research Module 2 (MRM 2), Малый исследовательский модуль 2, or МИМ 2, is a docking module of the International Space Station. Its original name was Docking Module 2 (Stykovochniy Otsek 2 (SO-2)), as it is almost identical to the Pirs Docking Compartment. Added in 2009, Poisk was the first major Russian addition to the International Space Station since 2001.[1]


Crew looks out of Poisk window

Poisk docked to the zenith port of the Zvezda module on November 12, 2009, and will serve as a docking port for Soyuz and Progress spacecraft and as an airlock for spacewalks. Poisk will also provide extra space for scientific experiments, and provide power-supply outlets and data-transmission interfaces for two external scientific payloads to be developed by the Russian Academy of Sciences.

Two spacewalks conducted from the ISS in June 2009, successfully completed activities anticipating Poisk module's future berthing.

On 5 June 2009, during Russian Orlan EVA-22 spacewalk[2] Expedition 19/20 Commander Gennady Padalka and Flight Engineer Michael Barratt installed two Kurs docking antennas, a docking target and electrical connectors on the exterior of Zvezda's Service Module.

On June 10, 2009, during Russian Orlan EVA-23 spacewalk[3] Padalka and Barratt replaced a flat hatch cover in the forward section of Zvezda with a standard conical docking cone cover to allow for Poisk's docking.

On January 14, 2010, cosmonauts Oleg Kotov and Maksim Suraev conducted a spacewalk to outfit the Poisk module to prepare for receiving Soyuz and Progress ships in the future.[4] They deployed antennas and a docking target, installed two handrails and plugged the new module's Kurs antennas into the Kurs docking system circuitry.[5] The spacewalk lasted five hours and 44 minutes.

On January 21, 2010, the module was first used when cosmonaut Suraev and Expedition 22 Commander Jeffrey Williams relocated their Soyuz TMA-16 spacecraft from the aft port of the Zvezda module to the zenith-facing port of the Poisk module.[6] The Soyuz TMA-16 spacecraft undocked from the aft end of the Zvezda service module at 10:03 UTC and backed away to a distance of about 30m (100 feet) from the space station. Undocking occurred as the station flew about 343 km (213 miles) high off the southwest coast of Africa. Re-docking occurred at 10:24 UTC after Suraev fired the Soyuz maneuvering thrusters to fly halfway around the orbiting space station and line up with the Poisk module.

Design and construction

The module was designed and built by S.P. Korolev RSC Energia,[7][8][9] the leading organization engaged in the development and operational use of the ISS Russian segment.

Launch in 2009

The module was launched on November 10, 2009, 2:22 p.m. GMT[10][11] attached to a modified Progress spacecraft, called Progress M-MIM2, on a Soyuz-U rocket from Launch Pad 1 at the Baikonur Cosmodrome in Kazakhstan. The occasion also marked the 1750th launch of a Soyuz rocket in its various configurations.[12] About eight minutes after launch, the three-stage Soyuz rocket delivered Poisk, to a low-altitude injection orbit. According to NASA Poisk carried about 816kg (1800 pounds) of cargo to the ISS including new Russian Orlan spacesuits, life support equipment, medical supplies and crew hygiene items.

The Progress space tug provided electrical power and propulsion for the Poisk module during its two-day journey to the space station. On 12 November, Progress began its automated final approach to the station on a Kurs rendezvous radar system and at 15:41 UTC[13] Poisk docked to the Zvezda module's zenith port. The docking happened as the space station sailed more than 354km (220 miles) over northern Kazakhstan.

Cosmonauts Maksim Suraev and Roman Romanenko entered the module for the first time by opening the hatch leading into Poisk at 12:17 UTC on 13 November 2009.

The jettisoning of the Progress ship from the Poisk module happened around 8 December 2009. The Progress was destroyed during re-entry into the atmosphere.


Poisk after arriving at the Space Station on November 12, 2009.
Designation[14] 240GK No. 2L
Launch mass 3670 kg ± 50 kg
Maximum hull diameter 2.55 m
Hull length between docking assembly planes 4.049 m
Pressurized volume 14.8 m3
Habitable volume 10.7 m3
Number of egress hatches (open inward) 2
Egress hatch diameter 1 m
Mass of delivered cargoes up to 1000 kg

False depressurization alarm

False alarms woke the crews aboard space shuttle Atlantis and the Space Station at 01:36 UTC on 20 November 2009 and once again at 02:53 UTC on 21 November.[15][16] An erroneous indication of a rapid depressurization led to the automatic shutdown of ventilation fans throughout the station, which stirred up dust and led to a false smoke detection alarm in the European Space Agency's Columbus laboratory. Mission control Capcom Frank Lien in Houston told Expedition 21 Commander Frank De Winne it might have originated with the Poisk module.

Visiting spacecraft

Spacecraft Docking Undocking
Soyuz TMA-16 January 21, 2010
05:24 UTC
March 18, 2010
08:03 UTC
Soyuz TMA-18 April 4, 2010
05:25 UTC
September 25, 2010
02:02 UTC
Soyuz TMA-01M October 10, 2010
00:01 UTC
March 16, 2011
04:27 UTC
Soyuz TMA-22 November 16, 2011
05:24 UTC
April 27, 2012
08:15 UTC
Soyuz TMA-04M May 17, 2012
04:36 UTC
September 16, 2012
23:09 UTC
Soyuz TMA-06M October 25, 2012
12:29 UTC
March 15, 2013
23:43 UTC
Soyuz TMA-08M March 29, 2013
02:28 UTC
September 10, 2013
23:27 UTC
Soyuz TMA-10M September 26, 2013
02:45 UTC
March 11, 2014 00:02 UTC
Soyuz TMA-12M March 27, 2014
23:53 UTC
September 10, 2014
23:01 UTC
Soyuz TMA-14M September 26, 2014
02:11 UTC
March 11, 2015
22:44 UTC
Soyuz TMA-16M March 28, 2015
01:33 UTC
September 11, 2015
21:29 UTC


See also


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  10. ^
  11. ^
  12. ^
  13. ^ New Russian module docks to station
  14. ^
  15. ^
  16. ^
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