Gemini 11 launched on 12 September 1966, piloted by Commander Charles Conrad Jr., USN, and Lieutenant Commander Richard F. Gordon Jr., USN. The mission lasted 2 days and 23 hours and included 44 orbits at an altitude of 1,368.9 km. On 14 September, the Agena engine fired for 26 seconds, taking Gemini 11 to 850 miles above the Earth, breaking the 475-mile altitude record set in July 1966 by Gemini X. Recovery was by HS-3 helicopter from USS Guam (LPH-9).
For more information, visit NASA’s Gemini Program webpage.