NASA and SpaceX Adjust Agency’s Crew-4 Launch Date

Crew-4 astronauts
NASA’s SpaceX Crew-4 astronauts, from left, Jessica Watson, Bob Hines, and Kjell Lindgren, and ESA astronaut Samantha Cristoforetti stand outside Kennedy Space Center’s Neil Armstrong Operations and Checkout Building during a dry dress rehearsal on April 20, 2022. Photo credit: NASA/Kim Shiflett

NASA and SpaceX now are targeting no earlier than 3:52 a.m. EDT Wednesday, April 27, for launch of the agency’s SpaceX Crew-4 mission to the International Space Station from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.

Teams decided to wave off a potential launch opportunity on April 26 until further into the week when space station positioning and orbital mechanics are more favorable. Crew-4 has another launch opportunity available Thursday, April 28, as weather continues to be a watch item heading into next week.

For a Crew-4 launch Wednesday, April 27, NASA will host a prelaunch news teleconference at approximately 9:30 p.m. Monday, April 25, with the following participants:

  • Steve Stich, manager, Commercial Crew Program, NASA Kennedy
  • Joel Montalbano, manager, International Space Station Program, NASA Johnson
  • Zeb Scoville, flight director, Flight Operations Directorate, Johnson
  • Jessica Jensen, vice president, customer operations and integration, SpaceX
  • Frank de Winne, manager, International Space Station Program, ESA
  • Arlena Moses, launch weather officer, U.S. Space Force 45th Weather Squadron

Media may ask questions via phone only. The teleconference audio will stream on nasa.gov/live. For the dial-in number and passcode, please contact the Kennedy newsroom no later than 8:30 p.m. on April 25 at: ksc-newsroom@mail.nasa.gov.

Additional adjustments to the Crew-4 launch date may be necessary in the event inclement weather prevents an on time splashdown of the Axiom Mission 1 (Ax-1) currently docked to the space station. Ax-1, the first all private astronaut mission to the station, now is targeted to undock from the orbital complex at 6:35 p.m. Saturday, April 23, and splashdown at 1:46 p.m. Sunday, April 24, off the coast of Florida. The Ax-1 crew and Dragon spacecraft remain healthy at station.

The Crew-4 flight will carry NASA astronauts Kjell Lindgren, mission commander, Robert Hines, pilot, and Jessica Watkins, mission specialist and ESA astronaut Samantha Cristoforetti, who will serve as a mission specialist, to the space station for a science expedition mission. The astronauts will fly a new Dragon spacecraft, named Freedom, atop a flight proven Falcon 9 rocket. Following docking of Crew-4, NASA’s SpaceX Crew-3 mission is expected to complete an approximate five-day handover with Crew-4 before undocking from the space station and returning to Earth.


Learn more about Crew-4 by exploring the Commercial Crew Press Kit.

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

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Station Crew Awaits Ax-1 Departure and Crew-4 Launch

International Space Station Configuration. Six spaceships are parked at the space station including the SpaceX Dragons Endurance and Endeavour; the Northrop Grumman Cygnus space freighter; and Russia's Soyuz MS-21 crew ship and the Progress 79 and 80 resupply ships.
International Space Station Configuration. Six spaceships are parked at the space station including the SpaceX Dragons Endurance and Endeavour; the Northrop Grumman Cygnus space freighter; and Russia’s Soyuz MS-21 crew ship and the Progress 79 and 80 resupply ships.

The integrated NASA, Axiom Space, and SpaceX teams have agreed on a plan for the Axiom Mission 1 (Ax-1) crew to undock from the International Space Station at 8:35 p.m. EDT Saturday, April 23, for a splashdown off the coast of Florida about 1:46 p.m. Sunday, April 24. The decision was made based on the best weather for splashdown of the first private astronaut mission to visit the International Space Station and the return trajectory required to bring the crew and the SpaceX Dragon Endeavour spacecraft back to Earth safely.

NASA will provide live coverage of departure activities beginning at 6:15 p.m. Saturday, April 23, with hatch closure targeted for 6:30 p.m. Coverage will resume at 8:15 p.m. for the undocking. Teams will continue to monitor weather at the splashdown sites prior to undocking to ensure conditions are acceptable for a safe recovery of the Ax-1 astronauts and Dragon spacecraft.

NASA and Axiom mission planning prepared for the possibility of additional time on station for the private astronauts, and there are sufficient provisions for all 11 crew members aboard the space station. The Ax-1 crew continues to work through previously planned mission activities. The Ax-1 crew and Dragon spacecraft remain healthy.

The departure of Dragon Endeavour from the space station will clear the docking port for the arrival of Dragon Freedom and NASA’s SpaceX Crew-4 astronauts. The earliest potential launch opportunity for the Crew-4 mission is 4:15 a.m. Tuesday, April 26, with additional opportunities Wednesday, April 27, and Thursday, April 28. These launch opportunities are undergoing a more detailed program review to ensure they align with integrated operational timelines. The teams want to provide a two-day gap after Ax-1 return for data reviews from splashdown and to prepare for the Crew-4 launch, including the staging of recovery assets.

The Crew-4 astronauts spent last night at the Kennedy Space Center in Florida rehearsing the countdown to their launch inside the SpaceX Dragon Freedom, the company’s newest crew ship. Overnight, Crew-4 Commander Kjell Lindgren, Pilot Robert Hines with Mission Specialists Jessica Watkins and Samantha Cristoforetti, put on their pressure suits and entered their vehicle conducting a successful dry dress rehearsal. The Falcon 9 rocket, with the Freedom perched atop, stands at Launch Complex 39A.

Expedition 67 crewmates Raja Chari and Tom Marshburn, who are also the SpaceX Crew-3 commander and pilot respectively, spent a little time on Wednesday with their upcoming departure activities. The pair, along with Kayla Barron of NASA and Matthias Maurer of ESA, will wait for the arrival of their Crew-4 replacements before returning to Earth a few days later inside the Dragon Endurance vehicle. The four astronauts had a light-duty day on Wednesday scheduling in some housecleaning tasks.

Over in the Russian segment of the station, cosmonauts Oleg Artemyev and Denis Matveev wrapped up their post-spacewalk activities today stowing their tools and discussing the excursion with specialists on the ground. The duo kicked off a series of spacewalks on April 18 to configure the European robotic arm for operations on the Nauka multipurpose laboratory module. Roscosmos Flight Engineer Sergey Korsakov started his day with electronics and communications maintenance before studying future spacecraft and robotic piloting techniques in the afternoon.

NASA, SpaceX Adjust Target Launch Date for Crew-4 Mission

Shown is the official crew portrait of SpaceX Crew-4 astronauts representing NASA’s Commercial Crew Program. From left are Pilot Robert Hines, Mission specialists Samantha Cristoforetti and Jessica Watkins, and Commander Kjell Lindgren. Hines, Watkins, and Lindgren are NASA astronauts; Cristoforetti is an ESA (European Space Agency) astronaut.

Axiom Space and SpaceX are adjusting the launch date for the Axiom Mission 1 (Ax-1) to the International Space Station to allow teams to complete final spacecraft processing ahead of the mission. The Ax-1 crew will fly on Dragon Endeavour to and from the space station. After 10 days in orbit, the Ax-1 crew will splash down off the coast of Florida.

NASA and SpaceX also will adjust the target launch date for the agency’s SpaceX Crew-4 mission to the International Space Station to allow appropriate spacing for operations and post-flight data reviews between human spaceflight missions and to allow for multiple consecutive launch attempts based on the orbital mechanics for arrival to the space station. The current no earlier than launch date is Tuesday, April 19, pending completion of program reviews expected early next week to formalize the new target.

Crew-4 will carry an international crew of four astronauts to the orbital complex on a new Dragon spacecraft and flight proven Falcon 9 rocket for a science expedition mission.