Gemini IV
Four days in orbit and Ed White's spacewalk turn Gemini 4 into America's first long-duration flight and first EVA
Gemini 4 carried James McDivitt and Ed White for four days, more than doubling the duration of any previous American crewed mission. An early attempt to approach the spent Titan II showed how difficult orbital would be without precise procedures and navigation. White then left the cabin for 23 minutes using a handheld maneuvering gun, becoming the first American to walk in space. The flight tested crew endurance, life support, tracking, experiments, and a new center while giving NASA both a landmark EVA success and hard operational lessons for later rendezvous missions.
Mission dossier
Flight profile, locations, hardware, and outcome in the same reference format used throughout the archive.
Flight profile
Places and recovery
Mission record
Assignment Manifest
The flight crew and the backup team assigned to train for this mission.
Prime crew
2 assignments
James A. McDivittprime crewCommand PilotLaunched June 3, 1965Returned June 7, 19654 days, 1 hour, 56 minutes, 12 secondsCommanded Gemini 4 during Ed White's first American EVA.Open astronaut archive
Edward Higgins White IIprime crewPilotLaunched June 3, 1965Returned June 7, 19654 days, 1 hour, 56 minutes, 12 secondsPiloted Gemini 4 and conducted the first American EVA.Open astronaut archiveBackup crew
Trained for the mission but did not count as flown unless reassigned to the prime crew.
Mission Purpose
2 sources- Operate the Gemini spacecraft and its two-person crew for four days to extend American endurance and evaluate systems over a multi-day mission.
- Approach and station keep with the Titan II second to gather practical experience.
- Conduct the first American and evaluate the pressure suit, umbilical, handheld maneuvering unit, and crew procedures outside the cabin.
- Complete medical, navigation, radiation, photography, and spacecraft experiments before guided and recovery.
Planned Flight Plan
2 sources- June 3, 1965
Launch into a four-day mission
Gemini 4 begins the longest American crewed flight yet and activates the new Center in Houston.
- First orbit
Attempt station keeping with the Titan
McDivitt tries to close on the spent second stage, revealing that intuitive pursuit consumes fuel and does not produce orbital .
- Third orbit
Conduct the first American EVA
White exits with a handheld gas gun, moves outside for about 23 minutes, and returns after exhausting the maneuvering unit's gas.
- June 7, 1965
Complete endurance flight and recover
After 62 orbits of systems, medical, and experiment work, Gemini 4 returns to the western Atlantic.
Mission Timeline
2 sources- June 3, 1965
Gemini 4 begins America's first four-day flight
McDivitt and White reach orbit as Houston's new Center assumes full flight-control responsibility.
- First orbit
Failed pursuit teaches a lesson
Repeated attempts to approach the Titan stage consume propellant and demonstrate why orbital rendezvous needs calculated phasing maneuvers.
Open operation record - June 3, 1965
Ed White becomes the first American to walk in space
White uses a handheld maneuvering unit and the spacecraft umbilical during roughly 23 minutes outside Gemini 4.
- June 7, 1965
Four-day endurance objective completed
Gemini 4 lands in the Atlantic after 62 orbits, returning a large body of systems and human-performance data.