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 km).
Launch date: July 18, 1966, 22:20:26 UTC
Landing: July 21, 1966, 21:07:05 UTC
Measured 3 inches (7.62 cm) across.