Record-breaking NASA astronaut Peggy Whitson is set to depart the International Space Station (ISS) and return to Earth after completing a 288-day long mission, the US space agency said.
Ms Whitson is completing a 288-day mission that began in November 2016, spanning 122.2 million miles and 4,623 orbits of Earth - her third long-duration stay on the outpost.
At the time of their landing, she will have accrued a total of 665 days in space over the course of her career, more than any American astronaut, placing her eighth on the alltime space endurance list.
Ms Whitson, along with fellow Expedition 52 Flight Engineer Jack Fischer of NASA and Commander Fyodor Yurchikhin of the Russian space agency Roscosmos will undock their Soyuz MS-04 spacecraft from the space station and land in Kazakhstan at 9:22 pm EDT
Mr Yurchikhin and Mr Fischer, who launched in April, will complete 136 days in space.
Mr Yurchikhin will return to Earth with a total of 673 days in space on his five flights, putting him in seventh place on the all-time endurance list.