Explorer 11Juno II Army Ballistic Missile Agency Launch Status Success Thu ยท Apr 27th, 1961 9:16 AM EST Location Space Launch Complex 26B Cape Canaveral, FL, USA 214 rockets have launched from Cape Canaveral, FL, USA. Rocket Juno II Length: 24 meters Diameter: 2.67 meters First Launch: December 6, 1958 Juno II was an American space launch vehicle used during the late 1950s and early 1960s. It was derived from the Jupiter missile, which was used as the first stage. The Juno II rocket has been launched a total of 3 times with 1 successful and 2 failed launches. Agency Army Ballistic Missile Agency Abbreviation: ABMA Country: USA View Rocket Launch Schedule