Below are some of the key milestones leading up to the launch of NASA’s SpaceX Crew-4 mission, as well as some critical events that occur after liftoff. The SpaceX Falcon 9 rocket and Crew Dragon spacecraft are scheduled to lift off just a little more than four hours from now at 3:52 a.m. EDT from Kennedy Space Center’s historic Launch Complex 39A in Florida.
12:32 a.m. Crew walkout from Neil Armstrong Operations & Checkout Building
1:22 a.m. Crew arrival at Launch Complex 39A
1:37 a.m. Crew ingress into Freedom
1:57 a.m. Freedom hatch closure
2:43 a.m. Mission Director Go/No-Go poll for propellant loading
2:48 a.m. Final Go/No-Go for propellant loading
3:10 a.m. Crew access arm retracts
3:14 a.m. Dragon launch escape system is armed
3:17 a.m. Falcon 9 propellant loading begins
3:48 a.m. Strongback retraction
3:50 a.m. Falcon 9 propellant load complete and vehicle transitions to internal power
3:52 a.m. Liftoff!
4:01 a.m. Falcon 9 second stage engine cutoff (SECO)
NASA SpaceX Crew-4 mission astronauts are in the suit-up room in the Astronaut Crew Quarters inside Kennedy Space Center’s Neil A. Armstrong Operations and Checkout Building on April 27, 2022. A team of SpaceX suit technicians are helping them as they put on their custom-fitted spacesuits and check the suits for leaks. At center is ESA astronaut and Mission Specialist Samantha Cristoforetti. Photo credit: NASA
Crew-4 astronauts Kjell Lindgren, Robert Hines, and Jessica Watkins, and Samantha Cristoforetti have finished putting on their SpaceX spacesuits and will soon depart the Neil A. Armstrong Operations and Checkout Building for the short journey to Launch Complex 39A. At the pad, a SpaceX Falcon 9 rocket and Crew Dragon spacecraft stand ready for liftoff.
The Crew-4 mission will fly a new Crew Dragon spacecraft and will launch on a Falcon 9 booster that has previously sent four missions into space. It is tradition the first astronauts to fly a new capsule name their spacecraft; Crew-4 chose “Freedom” to celebrate a fundamental human right, and the industry and innovation that emanate from the unencumbered human spirit.
NASA SpaceX Crew-4 mission astronauts are in the suit-up room in the Astronaut Crew Quarters inside Kennedy Space Center’s Neil A. Armstrong Operations and Checkout Building on April 27, 2022. A team of SpaceX suit technicians are helping them as they put on their custom-fitted spacesuits and check the suits for leaks. Photo credit: NASA
NASA astronauts Kjell Lindgren, Robert Hines, and Jessica Watkins, and ESA (European Space Agency) astronaut Samantha Cristoforetti, are inside the Astronaut Crew Quarters at Kennedy Space Center’s Neil A. Armstrong Operations and Checkout Building, suiting up for tonight’s launch to the International Space Station.
A team of SpaceX suit technicians are helping them put on their custom-fitted spacesuits, while checking the suits for leaks. Designed for safety and functionality, the spacesuits also provide modern comfort and style. They supply pressurization, protecting the crew from potential depressurization, and a port located on the thigh connects to life support systems, including air and power. Also included in the suits are touchscreen-compatible gloves and a flame-resistant outer layer.
Hello, and welcome to live launch coverage of NASA’s SpaceX Crew-4 mission to the International Space Station! Here at the agency’s Kennedy Space Center in Florida, a SpaceX Falcon 9 rocket and Crew Dragon spacecraft, named Freedom by the crew, stand ready for launch. Liftoff is targeted for 3:52 a.m. EDT from Kennedy’s historic Launch Complex 39A.
The countdown is proceeding according to schedule, and the crew is going through checkouts inside the Neil A. Armstrong Operations and Checkout Building. After that, the Crew-4 astronauts will don their SpaceX spacesuits before exiting the building and heading out to the launch pad – this coming up in just about an hour.
Stay with us here on the blog as the countdown continues; we’ll keep you updated as we reach key milestones leading up to and through launch. Or watch live now on NASA Television or the agency’s website.
SpaceX’s Falcon 9 rocket with the Crew Dragon atop is seen at Kennedy Space Center’s Launch Complex 39A on April 26, 2022, ahead of the agency’s SpaceX Crew-4 launch. Photo credit: NASA
Just over four hours from now, a SpaceX Falcon 9 rocket and Crew Dragon spacecraft are scheduled to lift off from Kennedy Space Center’s Launch Complex 39A, carrying NASA astronauts Kjell Lindgren, Robert Hines, and Jessica Watkins, and ESA (European Space Agency) astronaut Samantha Cristoforetti to the International Space Station for the fourth crew rotation mission under the agency’s Commercial Crew Program.
Liftoff is targeted for 3:52 a.m. EDT – an instantaneous launch window – and launch weather officers with the 45th Weather Squadron at Cape Canaveral Space Force Station are predicting a 90% chance of favorable weather conditions for launch. The primary weather concerns are cumulus cloud and flight through precipitation rules. Teams also continue to monitor the weather conditions along in Crew Dragon’s flight path, which is expected to be favorable for launch. Live countdown coverage will begin at 12 a.m. on NASA Television and the agency’s website, as well as right here on the blog.
Following liftoff, the Crew-4 astronauts will have a 16 1/2-hour journey to the space station, where they will be greeted by NASA astronauts Raja Chari, Tom Marshburn, Kayla Barron, and ESA astronaut Matthias Maurer – the Expedition 67 crew – already on board. Crew-4 astronauts will remain at the station for a six-month science mission, living and working as part of a seven-member crew.
From left, moderator Megan Cruz, NASA Communications; Bill Nelson, NASA administrator; Bob Cabana, NASA associate administrator; Kathryn Lueders, associate administrator, Space Operations Mission Directorate, NASA Headquarters in Washington; Heidi Parris, associate program scientist for the International Space Station Program, NASA Johnson; and Josef Aschbacher, director general, ESA (European Space Agency) attend a Crew-4 press briefing April 26, 2022, at NASA’s Kennedy Space Center in Florida ahead of the agency’s SpaceX Crew-4 launch. Photo credit: NASA/Kim Shiflett
Earlier on Tuesday, April 26, NASA Administrator Bill Nelson and senior NASA leadership addressed members of the media during a briefing held at the agency’s Kennedy Space Center in Florida for NASA’s SpaceX Crew-4 mission, now less than a day away.
“Flying safely with crew means that you’ve got to do it one step at a time,” said Kathryn Lueders, associate administrator, Space Operations Mission Directorate, NASA Headquarters. “So, tomorrow morning, we’re hoping that you’ll get to see a really, really beautiful step, and we’ll get our crew safely to orbit.”
Lindgren and Hines were assigned to the Crew-4 mission in February 2021 and began working and training on SpaceX’s next-generation human spacecraft and for their stay aboard the space station. Cristoforetti was assigned to the mission in March 2021 and Watkins was added as the fourth crew member in November 2021.
The Crew-4 mission continues NASA’s efforts to restore and maintain American leadership in human spaceflight. Regular commercial crew rotation missions enable NASA to continue the important research and technology investigations taking place aboard the station. Such research benefits people on Earth and lays the groundwork for future exploration beyond low-Earth orbit, starting with the agency’s Artemis missions, which includes landing the first woman and person of color on the lunar surface.
The SpaceX Falcon 9 rocket and Crew Dragon spacecraft, which the crew has named Freedom, are scheduled to lift off at 3:52 a.m. EDT on Wednesday, April 27. Just over 17 hours after launch, the crew is expected to arrive at the orbiting laboratory. Docking is planned for approximately 8:15 p.m. EDT on Wednesday, April 27.
Weather officials with the U.S. Space Force’s 45th Weather Squadron are predicting an 90% chance of favorable weather conditions for launch – this is derived from Falcon 9 Crew Dragon launch weather criteria. The primary weather concerns are cumulus cloud and flight through precipitation rules.
For more than 21 years, humans have continuously lived and worked aboard the International Space Station, advancing scientific knowledge and demonstrating new technologies that enable us to prepare for human exploration to the Moon and Mars. The station’s design requires humans living aboard to maintain it, operate it, and upgrade it; thus, International Space Station operations, including commercial resupply and commercial crew, are essential to the mission.
Live coverage of launch preparations and liftoff will begin at 12 a.m. EDT on Wednesday, April 27, on NASA Television, the NASA app, and the agency’s website.
On Tuesday, April 26, teams with NASA and SpaceX completed the final major review – the Launch Readiness Review (LRR) – for the agency’s Crew-4 mission to the International Space Station. At the conclusion of the review, the team confirmed the target launch time of 3:52 a.m. EDT on Wednesday, April 27, from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
NASA’s SpaceX Crew-4 mission coverage is as follows for Tuesday, April 26 (all times Eastern):
A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen on the launch pad at Launch Complex 39A as preparations continue for the Crew-4 mission, Saturday, April 23, 2022, at NASA’s Kennedy Space Center in Florida. Photo credit: NASA/Joel Kowsky
7 a.m. (approximately) – Prelaunch news teleconference at Kennedy with the following participants:
Steve Stich, manager, Commercial Crew Program, NASA Kennedy
Joel Montalbano, manager, International Space Station Program, NASA Johnson
Zeb Scoville, chief flight director, Flight Operations Directorate, NASA Johnson
Jessica Jensen, vice president, customer operations and integration, SpaceX
Josef Aschbacher, director general, ESA
Arlena Moses, launch weather officer, U.S. Space Force 45th Weather Squadron
9 a.m. – NASA administrator media briefing on NASA TV with the following participants:
Bill Nelson, NASA administrator
Bob Cabana, NASA associate administrator
Kathryn Lueders, associate administrator, Space Operations Mission Directorate, NASA Headquarters in Washington
Josef Aschbacher, director general, ESA
Heidi Parris, associate program scientist for the International Space Station Program, NASA Johnson
Weather officials with the U.S. Space Force 45th Weather Squadron continue to predict a 90% chance of favorable weather conditions at the launch pad for liftoff of the Crew-4 mission based on Falcon 9 Crew Dragon launch weather criteria. The primary weather concerns for the launch area are the cumulus cloud and flight through precipitation rules. Teams will also monitor weather conditions both for the launch area and downrange for the flight of Crew Dragon.
A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen on the launch pad at Launch Complex 39A as preparations continue for the Crew-4 mission, Monday, April 25, 2022, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Crew-4 mission is the fourth crew rotation mission of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. Photo Credit: NASA/Joel Kowsky
NASA’s SpaceX Crew-4 launch is targeted at 3:52 a.m. EDT Wednesday, April 27, to the International Space Station from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
The U.S. Space Force 45th Weather Squadron predicts a 90% chance of favorable weather conditions at the launch pad for liftoff of the Crew-4 mission based on Falcon 9 Crew Dragon launch weather criteria. The primary weather concerns for the launch area are the cumulus cloud and flight through precipitation rules. Teams also will monitor weather conditions both for the launch area and downrange for the flight of Crew Dragon.
NASA will provide coverage of the upcoming prelaunch activities for the mission sending astronauts to the microgravity laboratory. Prelaunch activities will air live on NASA Television, the NASA app, and the agency’s website. NASA’s SpaceX Crew-4 prelaunch coverage is as follows (all times Eastern):
Tuesday, April 26
7 a.m. (approximately) – Prelaunch news teleconference at Kennedy (no earlier than one hour after completion of the launch readiness review) with the following participants:
Steve Stich, manager, Commercial Crew Program, NASA Kennedy
Joel Montalbano, manager, International Space Station Program, NASA Johnson
Zeb Scoville, chief flight director, Flight Operations Directorate, NASA Johnson
Jessica Jensen, vice president, customer operations and integration, SpaceX
Josef Aschbacher, director general, ESA
Arlena Moses, launch weather officer, U.S. Space Force 45th Weather Squadron
Media may ask questions via phone only. For the dial-in number and passcode, please contact the Kennedy newsroom no later than 6 a.m. on Tuesday, April 26, at: ksc-newsroom@mail.nasa.gov.
9 a.m. – NASA Administrator Media Briefing on NASA TV with the following participants:
NASA Administrator Bill Nelson
NASA Associate Administrator Bob Cabana
Kathryn Lueders, associate administrator, Space Operations Mission Directorate, NASA Headquarters
Heidi Parris, associate program scientist for the International Space Station Program
Josef Aschbacher, director general, ESA
Media may ask questions in-person and via phone. Limited auditorium space will be available for in-person participation. For the dial-in number and passcode, please contact the Kennedy newsroom no later than 8 a.m. on Tuesday, April 26, at: ksc-newsroom@mail.nasa.gov.
NASA will provide a live video feed of Launch Complex 39A beginning Monday morning. Pending unlikely technical issues, the feed will be uninterrupted through launch: https://youtube.com/kscnewsroom.
A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen on the launch pad at Launch Complex 39A during a brief static fire test ahead of NASA’s SpaceX Crew-4 mission, Wednesday, April 20, 2022, at NASA’s Kennedy Space Center in Florida. Photo credit: NASA/Aubrey Gemignani
On April 20, the SpaceX Falcon 9 rocket that will launch the Dragon Freedom capsule and Crew-4 astronauts to the International Space Station surpassed a key milestone ahead of launch. While vertical on the launch pad at Kennedy Space Center’s Launch Complex 39A in Florida, the rocket’s nine Merlin first-stage engines roared to life for seven seconds, completing the routine but critical integrated static fire test.
The Crew-4 mission will carry Mission Commander Kjell Lindgren, Pilot Robert Hines, and Mission Specialist Jessica Watkins, as well as ESA (European Space Agency) astronaut Samantha Cristoforetti, who will also serve as a mission specialist, to the space station for a six-month science mission.
A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen at sunrise on the launch pad at Launch Complex 39A as preparations continue for the Crew-4 mission, Wednesday, April 20, 2022, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Crew-4 mission is the fourth crew rotation mission of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. Photo Credit: NASA/Joel Kowsky
The SpaceX Falcon 9 rocket, with Crew Dragon atop, rolled out to the launch pad on April 19, at Kennedy Space Center in Florida in preparation for NASA’s Crew-4 launch. The rocket is now in a vertical position at Kennedy’s Launch Pad 39A and underwent a successful dry dress rehearsal in the early morning hours of April 20 with the launch team and crewmembers.
The mission will fly a new Crew Dragon, which crew members have named Freedom. Mission Commander Lindgren tweeted the significance of the name: “The name celebrates a fundamental human right, and the industry and innovation that emanate from the unencumbered human spirit.” The spacecraft’s name also recalls Freedom 7, the spacecraft that carried Alan Shepard as the first American launched into space on May 5, 1961 aboard NASA’s Mercury-Redstone 3.
