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Gemini IV

Pad LC-19 (19) 
Titan-II (4) 
First NASA EVA   


James A. McDivitt, Commander 
Edward H. White II, Pilot  

Backup Crew CapCom



Gemini-IV capsule  
Altitude: 296.1 km (159.9nm) 
Inclination: 32.5 degrees 
Orbits: 62 
Duration: 4 Days, 1 hour, 56 min, 12 seconds 
Distance: 2,590,561 km

Mission Objective

Evaluate effects of prolonged space flight. Demonstrate and evaluate performance of spacecraft and systems in 4-day flight. Evaluate procedures for crew rest and work cycles, eating schedules, and realtime flight planning. Spacecraft weight: 3574kg. 

Secondary objectives included: Demonstrate and evaluate EVA and control by use of HHMU and tether. Stationkeep and rendezvous with second stage of GLV. Evaluate spacecraft systems. Make in-and-out-of plane maneuvers. Further test OAMS retro backup capability. Perform 11 experiments. 



June 3, 1965 10:15:59.562 am.  June 7, 1965. Landing was at 27deg 44min North and 74deg 11min West. Landing was 81.4km from attempted landing zone.

Mission Highlights

Gemini-4 was NASA's 1st Extra Vehicular Activity (EVA) operation. EVA time 36min.  All but one primary objectives were achieved. Computer controlled reentry in the demonstration and evaluation of spacecraft systems objective was not flown because of inadvertent alteration of computer memory. All secondary objectives were met except one. The secondary objective of station keeping and rendezvous was only partially successful because separation and rendezvous was not attempted due to fuel consumption.   


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