This is the Official, NASA Expedition Mission 4" Patch
The International Space Station's Expedition 51 begins with the undocking of Soyuz MS-02 in February 2017. New crew members will arrive shortly thereafter on Soyuz MS-04.
Expedition 51 will be commanded by astronaut Peggy Whitson of NASA. Her crewmates include cosmonauts Oleg Novitskiy, Alexander Misurkin and Nikolai Tikhonov, astronaut Mark Vande Hei of NASA, and Thomas Pesquet of the European Space Agency.