| Promotional Poster | |
| Mission type | Long-duration expedition |
|---|---|
| Expedition | |
| Space station | International Space Station |
| Began | 27 April 2012, 08:15 UTC [1] |
| Ended | 1 July 2012, 04:48 UTC [2] |
| Arrived aboard | Soyuz TMA-03M Soyuz TMA-04M |
| Departed aboard | Soyuz TMA-03M Soyuz TMA-04M |
| Crew | |
| Crew size | 6 |
| Members | Expedition 30/31: Oleg Kononenko André Kuipers Don Pettit Expedition 31/32: Joseph M. Acaba Gennady Padalka Sergei Revin |
| Expedition 31 mission patch (l-r) Acaba, Padalka, Revin, Kuipers, Kononenko and Pettit | |
Expedition 31 was the 31st long-duration expedition to the International Space Station (ISS). It began on 27 April 2012 with the departure from the ISS of the Soyuz TMA-22 spacecraft, which returned the Expedition 30 crew to Earth. [1] The expedition ended on 1 July 2012, when crew members Oleg Kononenko, André Kuipers and Don Pettit departed from the ISS aboard Soyuz TMA-03M, marking the beginning of Expedition 32. [2]
| Position | First part (April 2012 to May 2012) | Second part (May 2012 to July 2012) |
|---|---|---|
| Commander | Second spaceflight | |
| Flight Engineer 1 | Second and last spaceflight | |
| Flight Engineer 2 | Third spaceflight | |
| Flight Engineer 3 | Second spaceflight | |
| Flight Engineer 4 | Fourth spaceflight | |
| Flight Engineer 5 | Only spaceflight | |
Expedition 31 formally began on 27 April 2012, with the departure from the ISS of the Soyuz TMA-22 spacecraft. Soyuz TMA-22 successfully returned Expedition 30 astronauts Dan Burbank, Anton Shkaplerov and Anatoli Ivanishin to Earth. [1] The ISS was left under the command of astronauts Kononenko, Kuipers and Pettit, who had arrived at the station aboard Soyuz TMA-03M on 23 December 2011.
The final three members of Expedition 31 – Acaba, Padalka and Revin – arrived at the ISS aboard Soyuz TMA-04M, which launched on 15 May 2012, [7] and docked to the ISS on 17 May at 4:36 UTC. [8]
SpaceX's unmanned Dragon spacecraft conducted a test rendezvous with the ISS during Expedition 31, as part of NASA's Commercial Orbital Transportation Services program; it was the first commercial spacecraft to rendezvous with the ISS. Following a series of delays, [9] Dragon launched on 22 May 2012, and berthed successfully with the ISS on 25 May, after conducting a series of orbital test manoeuvres. [10] [11] Dragon carried around 460 kilograms (1,010 lb) of cargo to the ISS, including food, clothing, a laptop computer and 15 student experiments. [10] After being loaded with 660 kilograms (1,460 lb) of downmass cargo, including completed experiments and redundant equipment, it undocked from the station and returned to Earth on 31 May 2012. [12] [13] Dragon landed intact in the Pacific Ocean and was successfully recovered, allowing SpaceX to begin regular cargo flights to the ISS. [14] The first such logistics mission, CRS SpX-1, launched successfully in October 2012. [15] [16]
Soyuz TMA-03M departed from the ISS on 1 July 2012, successfully returning Kononenko, Kuipers and Pettit to Earth. Their departure marked the formal end of Expedition 31, and the beginning of Expedition 32. [2]
In the 2012 The Big Bang Theory episode "The Friendship Contraction", character Howard Wolowitz reveals that he will be a member of a fictionalized version of Expedition 31, alongside Dimitri Rezinov, a character created for the show, and Mike Massimino, playing a fictional version of himself. [17]
This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration .