Gemini 10

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Gemini 10 (officially Gemini X) was a 1966 manned spaceflight in NASA's Gemini program. It was the 8th manned Gemini flight, the 16th manned American flight and the 24th spaceflight of all time (includes X-15 flights over 100 kilometres (62 mi)).



Backup crew

Mission parameters


  • Docked: July 19, 1966 - 04:15:00 UTC
  • Undocked: July 20, 1966 - 19:00:00 UTC

Space walk

  • Collins - EVA 1 (stand up)
    • Start: July 19, 1966, 21:44:00 UTC
    • End: July 19, 1966, 22:33:00 UTC
    • Duration: 0 hours, 49 minutes
  • Collins - EVA 2
    • Start: July 20, 1966, 23:01:00 UTC
    • End: July 20, 1966, 23:40:00 UTC
    • Duration: 0 hours, 39 minutes


Gemini established that radiation at high altitude was not a problem. After docking with their Agena booster in low orbit, Young and Collins used it to climb another 763.8 kilometers to meet with the dead, drifting Agena left over from the aborted Gemini VIII flight-thus executing the program's first double rendezvous. With no electricity on board the second Agena the rendezvous was accomplished with eyes only - no radar. After the rendezvous, Collins space-walked over to the dormant Agena at the end of a 15.24 meter tether, making Collins the first person to meet another spacecraft in orbit. He retrieved a cosmic dustcollecting panel from the side of the Agena, but returned no pictures of his close encounter — in the complicated business of keeping his tether clear of the Gemini and Agena, Collins' Hasselblad camera worked itself free and drifted off into orbit.

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