Japan’s Takuya Onishi, 49, and three other astronauts arrived at the International Space Station on a Crew Dragon spacecraft Sunday, marking the start of their long-term stay. About 90 minutes after the spacecraft of Space Exploration Technologies Corp.

Wilmore and Williams will now begin preparing for departure and their ocean splashdown off the Florida coast, no sooner than March 19. Along with the pair, Nasa astronaut Nick Hague and Russian cosmonaut Aleksandr Gorbunov will also be aboard the returning Dragon capsule.