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Axiom Mission 4

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Axiom Mission 4

Axiom Mission 4 (Ax‑4) was a private crewed spaceflight to the International Space Station (ISS) operated by Axiom Space in partnership with SpaceX and NASA. The mission launched atop a SpaceX Falcon 9 Block 5 rocket, which placed the Crew Dragon Grace spacecraft into low Earth orbit. Ax-4 was the first mission to fly aboard the Crew Dragon capsule 'Grace' (C213), which is the fifth and final Dragon capsule manufactured. The launch was originally scheduled for June 11, 2025 from Launch Complex 39A at the Kennedy Space Center, but was scrubbed for a liquid oxygen leak. A separate leak in the ISS's Zvezda module led to an additional two week launch delay. The mission was eventually launched on June 25, 2025 at 06:31:53 UTC (2:31:53 a.m. EDT) for an 18-day stay at the ISS before undocking and splashing down in the Pacific Ocean off the coast of San Diego on July 15, 2025 at 09:31:41 UTC (2:31:41 am PDT).

Infobox

Names
Ax-4
Mission type
Private spaceflight to the ISS
Operator
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COSPAR ID
2025-136A
SATCAT no.
64593
Mission duration
20 days, 2 hours and 59 minutes
Spacecraft
Crew Dragon Grace
Spacecraft type
Crew Dragon
Manufacturer
SpaceX
Crew size
4
Members
mw- Peggy WhitsonShubhanshu ShuklaSławosz Uznański-WiśniewskiTibor Kapu
Launch date
June 25, 2025, 06:31:53 UTC (2:31:53 am EDT)
Rocket
Falcon 9 Block 5 B1094-2, Flight 495
Launch site
Kennedy, LC‑39A
Contractor
SpaceX
Recovered by
MV Shannon
Landing date
July 15, 2025, 09:31:41 UTC (2:31:41 am PDT)
Landing site
mw- 32°36′N 117°42′W / 32.6°N 117.7°W / 32.6; -117.7)
Reference system
Geocentric orbit
Regime
Low Earth orbit
Inclination
51.64°
Docking port
Harmony zenith
Docking date
June 26, 2025, 10:31:47 UTC
Undocking date
July 14, 2025, 11:15 UTC
Time docked
18 days, 43 minutes

Tables

Prime crew · Crew
Commander
Commander
Position
Commander
Astronaut
Peggy Whitson, Axiom SpaceFifth spaceflight
Pilot
Pilot
Position
Pilot
Astronaut
Shubhanshu Shukla, ISROFirst spaceflight
Mission specialist
Mission specialist
Position
Mission specialist
Astronaut
Sławosz Uznański-Wiśniewski, ESA/POLSAFirst spaceflight
Mission specialist
Mission specialist
Position
Mission specialist
Astronaut
Tibor Kapu, HSOFirst spaceflight
Position
Astronaut
Commander
Peggy Whitson, Axiom SpaceFifth spaceflight
Pilot
Shubhanshu Shukla, ISROFirst spaceflight
Mission specialist
Sławosz Uznański-Wiśniewski, ESA/POLSAFirst spaceflight
Mission specialist
Tibor Kapu, HSOFirst spaceflight
Backup crew · Crew
Commander
Commander
Position
Commander
Astronaut
Michael López-Alegría, Axiom Space
Pilot
Pilot
Position
Pilot
Astronaut
Prasanth Nair, ISRO
Mission specialist
Mission specialist
Position
Mission specialist
Astronaut
Gyula Cserényi, HSO
Position
Astronaut
Commander
Michael López-Alegría, Axiom Space
Pilot
Prasanth Nair, ISRO
Mission specialist
Gyula Cserényi, HSO
· Mission
1
1
Attempt
1
Planned
11 Jun 2025, 8:00:00 am
Result
Scrubbed
Turnaround
Reason
Technical
Decision point
10 Jun 2025, 8:45 pm
Notes
Liquid oxygen leak found on rocket following static fire. Launch scheduled for 8:00 UTC and scrubbed at 20:45 UTC.
2
2
Attempt
2
Planned
22 Jun 2025, 3:42:00 am
Result
Scrubbed
Turnaround
10 days 19 hours 42 minutes
Reason
Technical
Decision point
19 Jun 2025, 6:48 pm
Notes
Air leak in Zvezda ISS module. Scrubbed at 18:48 UTC.
3
3
Attempt
3
Planned
25 Jun 2025, 2:31:53 am
Result
Success
Turnaround
2 days 22 hours 50 minutes
Notes
Launched at 06:31 UTC.
Attempt
Planned
Result
Turnaround
Reason
Decision point
Weather go (%)
Notes
1
11 Jun 2025, 8:00:00 am
Scrubbed
Technical
10 Jun 2025, 8:45 pm
Liquid oxygen leak found on rocket following static fire. Launch scheduled for 8:00 UTC and scrubbed at 20:45 UTC.
2
22 Jun 2025, 3:42:00 am
Scrubbed
10 days 19 hours 42 minutes
Technical
19 Jun 2025, 6:48 pm
Air leak in Zvezda ISS module. Scrubbed at 18:48 UTC.
3
25 Jun 2025, 2:31:53 am
Success
2 days 22 hours 50 minutes
Launched at 06:31 UTC.

References

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