Typed on verso: "NASA-Marshall Space Flight Center / Huntsville, Alabama / For Release: January 31, 1958 / Photo No.: 8-56893 / Photo Credit: National Aeronautics and Space Administration / HUNTSVILLE, Ala. -- This Jupiter-C vehicle placed the first U.S. satellite, Explorer I, in orbit January 31, 1958. The vehicle is shown here at what was then Cape Canaveral, Fla. The Explorer payload (the instrument package plus its burned-out fourth stage rocket) weighed a total of 30.8 pounds. The Jupiter-C was launched with a thrust of 83,000 pounds in the ground stage. Both the vehicle and its payload were developed by elements of the U.S. Army that are now major segments of the National Aeronautics and Space Administration. The Army Ballistic Missile Agency, forerunner of NASA's Marshall Space Flight Center, provided the Jupiter C launch vehicle and NASA's Jet Propulsion Laboratory furnished the Explorer I solid-fuel upper rocket stages and instrument package."
United States. National Aeronautics and Space Administration, [Jupiter-C launch vehicle], [2013-09-17_image_240]. Museum of Flight Digital Collections, accessed 18/01/2026, https://digitalcollections.museumofflight.org/nodes/view/15875