On May 17, 2012 at 04:35 UTC the "Soyuz TMA-04M” spacecraft docked with the Russian "Poisk” (MIM-2) module of the International Space Station. The Soyuz TMA-04M delivered three new members of Expedition 31 to the ISS, Russian cosmonauts Gennadiy Padalka and Sergey Revin as well as American astronaut Joseph Acaba.
The hatches between the spacecraft ant the station was opened at 07:16 UTC. The new comers joined current ISS expedition members, Russian cosmonaut Oleg Kononenko, American astronaut Donald Pettit and European Space Agency astronaut Andre Kuipers (the Netherlands) to form Expedition 31 crew of 6 members. Kononenko, Pettit and Kuipers have been aboard the station for almost five months since arriving in December 2011.
The mission of Padalka, Revin and Acaba is expected to last for 126 days.