STS-51-D
Space flight
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STS-51-D was the 16th flight of NASA's Space Shuttle program, and the fourth flight of Space Shuttle Discovery. The launch of STS-51-D from Kennedy Space Center, Florida, on April 12, 1985, was delayed by 55 minutes, after a boat strayed into the... Wikipedia
Dates: Apr 12, 1985 – Apr 19, 1985
Crew size: 7
Launch mass: 113,802 kg (250,890 lb)
Mission duration: 6 days, 23 hours, 55 minutes, 23 seconds (achieved)