NASA’s SpaceX Demo-2 ‘Go’ for Liftoff Wednesday After Today’s Launch Readiness Review

Demo-2 media teleconference
Representatives from NASA, SpaceX and the U.S. Air Force 45th Weather Squadron participate in a media teleconference following the Launch Readiness Review at the agency’s Kennedy Space Center in Florida on Monday, May 25, 2020, in advance of NASA’s SpaceX Demo-2 flight test to the International Space Station as part of NASA’s Commercial Crew Program. From left to right are: Norm Knight, deputy director, NASA Johnson Space Center Flight Operations; Kathy Lueders, manager, NASA Commercial Crew Program; Kirk Shireman, manager, International Space Station Program; Hans Koenigsmann, vice president, Build and Flight Reliability, SpaceX; and Mike McAleenan, launch weather officer, 45th Weather Squadron. Photo credit: NASA/Cory Huston

NASA’s SpaceX Demo-2 mission passed its final major review today at the agency’s Kennedy Space Center in Florida, and teams received the “go” to proceed toward launch. Liftoff of the SpaceX Falcon 9 rocket and Crew Dragon spacecraft, carrying NASA astronauts Robert Behnken and Douglas Hurley, is scheduled for Wednesday, May 27, at 4:33 p.m. EDT from Kennedy’s Launch Complex 39A.

The mission will return human spaceflight to the International Space Station from U.S. soil on an American rocket and spacecraft as a part of NASA’s Commercial Crew Program. Demo-2 will be SpaceX’s final test flight to validate its crew transportation system, including the Crew Dragon, Falcon 9, launch pad and operations capabilities.

“We’re burning down the final paper. All the teams are a go, and we’re continuing to progress toward our mission,” said Kathy Lueders, manager, NASA Commercial Crew Program. “I’m very proud of the team. We are continuing to be vigilant and careful, and make sure we do this right.”

In this morning’s official forecast, the U.S. Air Force 45th Weather Squadron predicted a 60% chance of unfavorable weather conditions for the Demo-2 mission. The primary weather concerns that could prevent launch are flight through precipitation, thick and cumulus clouds.

However, 45th Weather Squadron Launch Weather Officer Mike McAleenan pointed out things are looking up.

“It certainly has been trending better over the last day or two for launch weather,” McAleenan said. “If I was to issue the forecast today, right now, we would probably be down to 40% chance of violation.”

Crew members Behnken and Hurley remain in quarantine, a routine part of prelaunch preparations for astronauts journeying into space. On Saturday, they took part in a full dress rehearsal of launch day, including suiting up and climbing aboard the Crew Dragon at Launch Complex 39A.

“It was a really good review today, and from a crew perspective, we were very happy with the discussions that took place — the thoroughness of the review,” said Norm Knight, deputy director, Flight Operations, NASA Johnson Space Center. “We’re definitely ready to press forward.”

Upon arriving at the space station, Behnken and Hurley will join the Expedition 63 crew to conduct important research as well as support station operations and maintenance. While docked to the station, the crew will run tests to ensure the Crew Dragon spacecraft is capable on future missions of remaining connected to the station for up to 210 days.

“I think the on-orbit crew is definitely ready for some company, and very much looking forward to the launch this Wednesday,” said Kirk Shireman, manager, NASA International Space Station Program. “The ISS team is ready to support the docking of Crew Dragon.”

The specific duration for this mission will be determined after arrival based on the readiness of the next commercial crew launch. Finally, the mission will conclude with the Crew Dragon undocking from the station, deorbiting and returning Behnken and Hurley to Earth with a safe splashdown in the Atlantic Ocean.

SpaceX In-Flight Abort: Launch Window Update

SpaceX In-Flight Abort Test illustration
NASA and SpaceX teams are planning to target a launch of Saturday’s in-flight abort test in the last hour of the four-hour window. The test window opens at 8 a.m. EST. Illustration credit: SpaceX

NASA and SpaceX are targeting the launch of the company’s In-Flight Abort Test on Saturday, Jan. 18, from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.

Although the test window opens at 8 a.m. EST, teams are planning to target a launch in the last hour of the four-hour window due to sea state conditions for the splashdown of the Crew Dragon spacecraft in the Atlantic Ocean. The test teams will continue to monitor weather and update the launch time accordingly in the morning.

SpaceX will demonstrate Crew Dragon’s ability to safely escape the Falcon 9 rocket in the event of a failure during launch.

The test launch will air on NASA Television and the agency’s website.

Here’s the upcoming mission coverage:

 Saturday, Jan. 18

  • TBD a.m. – NASA TV test coverage will begin about 20 mins prior to liftoff
  • TBD a.m. – Post-test news conference at Kennedy, with the following representatives:
    • NASA Administrator Jim Bridenstine
    • SpaceX representative
    • Kathy Lueders, manager, NASA Commercial Crew Program
    • Victor Glover, astronaut, NASA Commercial Crew Program
    • Mike Hopkins, astronaut, NASA Commercial Crew Program

Learn more about NASA’s Commercial Crew Program by following the commercial crew blog, @commercial_crew and commercial crew on Facebook.

Commercial Crew Astronauts Named

NASA has selected four astronauts who will train to fly Commercial Crew flight tests in 2017 aboard the Boeing CST-100 and SpaceX Crew Dragon. Greg Hurley, Eric Boe, Bob Behnken, and Suni Williams have been selected to be the first astronauts to board those spacecraft.

Commercial Crew Astronauts

“What comes with our assignment is a fair amount of responsibility because there will be a legacy of astronauts for years and years to come who will have to live with the decisions that we in the agency are making with Boeing and SpaceX now,” said Bob Behnken of he and his fellow Commercial Crew astronauts.

Follow the Commercial Crew Program progress, at 

Celebrate the Fourth of July with Commercial Crew

4thCelebrate Fourth of July with Commercial Crew by coloring our newest coloring sheet. You candownload the sheet, at To follow the latest progress on NASA’s Commercial Crew Program, check out the Commercial Crew blog, at