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Launch SuccessfulUnited States Air Force
Delta 2913: COS-B
European astronomy satellite
Saturday, 9 August 1975
Mission Data
🇺🇸United States Air ForceEst. 1947
Launch VehicleDelta 2913
Vehicle FamilyDelta
Vehicle Record2 of 2 launches (100%)
Provider TypeGovernment
Agency Record972 successes / 106 failures (90%)
Success Streak68 consecutive
Mission TypeAstrophysics
Target OrbitElliptical Orbit
Launch PadSpace Launch Complex 2W
Location🇺🇸 Vandenberg SFB, CA, USA USA
Orbital Launches This Year#76
Agency Launches This Year#16
Launches From This Pad99
Launches From This Site923
Status Note
The launch vehicle successfully inserted its payload(s) into the target orbit(s).
About Delta 2913
The Delta 2000 series was an American expendable launch system which was used to conduct forty-four orbital launches between 1974 and 1981. It was a member of the Delta family of rockets. Several variants existed, which were differentiated by a four digit numerical code.
Launch Site
Space Launch Complex 2W · 34.7556°N 120.6224°W
Launch data from Launch Library 2 by The Space Devs.