Soyuz TMA-19M was a 2015 Russian Soyuz spaceflight to the International Space Station. It was launched on December 15, 2015 from Baikonur Cosmodrome, transporting three members of the Expedition 46 crew to the International Space Station. TMA-19M was the 128th flight of a Soyuz spacecraft since the first in 1967. The crew consisted of a Russian commander accompanied by American and British astronauts. The European segment of the mission was called "Principia". The flight returned to Earth on June 18, 2016. The Soyuz TMA-19M descent module is now in the collection of the UK's Science Museum Group.