NASA Administrator Jared Isaacman announced in a press conference today that NASA’s Crew 11 would return early from the International Space Station due to an unnamed medical issue with an unnamed member of the crew. The date and time of that return has not yet been determined, and will be announced once it is determined.

NASA astronauts Zena Cardman and Michael Fincke, JAXA astronaut Kimiya Yui, and Roscosmos cosmonaut Oleg Platonov comprise Crew 11.

“Yesterday, January 7th, a single crew member on board the station experienced a medical situation and is now stable. After discussions with Chief Health and Medical Officer Dr. J.D. Polk and leadership across the agency, I’ve come to the decision that it’s in the best interest of our astronauts to return Crew 11 ahead of their planned departure within the coming days.”

— NASA Administrator Jared Isaacman

Regarding the specifics of when Crew 11 will return, Isaacman added that, “We expect to provide a further update within the next 48 hours as to the expected anticipated undock and reentry timeline.” That’s Saturday afternoon. Stay tuned.

Crew 11 launched on August 1, 2025 and has spent 160 days in space since then. Originally planned to return next month after the arrival and handoff to Crew 12, which had planned to launch in mid-February.

Later, Isaacman said plainly, “This is not an emergency deorbit. We retain the capability to bring astronauts home in a matter of hours if necessary. So this is recognizing, first of all, we’re always going to do the right thing for our astronauts, but it’s recognizing it’s the end of the Crew 11 mission right now.”

So, one of the four astronauts has a serious enough issue to require testing or treatment on Earth, but it is not an immediate life-or-death emergency requiring Crew 11 to return to Earth with all possible haste. Instead, NASA is moving the timeline up for Crew 11’s return as a matter of prudence for one of its astronauts (or cosmonauts).

Once Crew 11 and Crew Dragon departs, ISS would be down to a skeleton crew: Sergey Kud-Sverchkov and Sergei Mikaev from Roscosmos and NASA’s Chris Williams. They would have only the Soyuz MS-28 spacecraft that docked on Nov. 27, 2025 as a return vehicle.

NASA is looking at accelerating the Crew 12 launch, but no new target date has been announced. “Alongside our international and commercial partners, NASA is evaluating their timeline to include earlier launch opportunities. We will provide more information when it’s available,” Isaacman announced.

What About Artemis II? Could This Issue Create A Delay?

Crew 12 is slated to fly in mid-February from The Cape, and launching earlier might have NASA preparing to launch two different crews on two entirely different missions in a very short timespan: Artemis II is currently scheduled to fly in early February. Launching Crew 12 earlier puts the two closer together on the calendar.

Asked if that would create a conflict within the agency, Isaacman replied to CBS News’s Bill Harwood that “These are totally separate campaigns at this point. We’re still evaluating what earlier dates would be achievable, if any, for Crew 12. So right now we’re going to look at all operations, all of our all of our standard process[es] to prepare for Crew 12 and look for opportunities if we can bring it in while simultaneously conducting our Artemis II campaign.”

Isaacman added that “There’s no reason to believe at this point in time that there would be any overlap that we’d have to de-conflict for.”

There is much more to come with this story.