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At 9:34 p.m. EST, the hatch closed between the Soyuz spacecraft and the International Space Station in preparation for undocking. NASA astronaut Christina Koch, Soyuz Commander Alexander Skvortsov of Roscosmos and Luca Parmitano of ESA (European Space Agency) are scheduled to undock their Soyuz at 12:50 a.m.

NASA Television will air live coverage of the undocking beginning at 12:15 a.m.; their landing in Kazakhstan is targeted for approximately 4:12 a.m.

The Expedition 61 crew members contributed to hundreds of experiments in biology, Earth science, human research, physical sciences and technology development, including improvements to the Alpha Magnetic Spectrometer in an effort to extend its life and support its mission of looking for evidence of dark matter and testing 3D biological printers to print organ-like tissues in microgravity.

Koch shared her most memorable moments, from her arrival to the space station on March 14, 2019, to her first glimpse of her hometown on Earth from space, to her first spacewalk.

Learn more about space station activities by following @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

NASA Television and the agency’s website are now broadcasting live coverage of the International Space Station’s Expedition 61 crew as they are preparing for their return to Earth.

NASA astronaut Christina Koch, Alexander Skvortsov of Roscosmos and Luca Parmitano of ESA (European Space Agency) are saying their farewells to NASA astronauts Jessica Meir and Andrew Morgan and Oleg Skripochka of Roscosmos before their board their Soyuz spacecraft and close the hatches between them and the space station. Hatches are expected to close at about 9:25 p.m. EST for a series of leak checks before the Soyuz undocks and returns to Earth early Thursday morning.

Learn more about space station activities by following @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

Record-setting astronaut Christina Koch, along with Alexander Skvortsov of Roscosmos and Luca Parmitano of ESA (European Space Agency) are preparing to depart the International Space Station just after midnight for their return to Earth early Thursday morning. Earlier today Expedition 61 Commander Parmitano passed control of the station to Oleg Skripochka of Roscosmos.

Tune in to NASA Television and the agency’s website tonight at 9 p.m. EST as Koch, Skvortsov, and Parmitano say farewell and board their Soyuz MS-13 spacecraft in preparation for their undocking and return to Earth.

Koch was a crew member for Expeditions 59, 60 and 61, spending 328 days living and working aboard the International Space Station.

During Koch’s 11-month mission, she participated in more than 210 investigations, helping advance NASA’s goals to return to the Moon under the Artemis program and prepare for human exploration of Mars. Koch participated in a number of studies to support those future exploration missions, including research into how the human body adjusts to weightlessness, isolation, radiation and the stress of long-duration spaceflight.

Learn more in Koch’s space station science scrapbook and her station science video.

Learn more about space station activities by following @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.