Breadcrumb Home Spaceflight Missions Spaceflight Missions Explorer 1 Explorer 3 Pioneer 10/11 Hawkeye 1 Spacecraft Launch Date (UT) Explorer 1 1958 Feb. 1 Explorer 3 1958 Mar. 26 Explorer 4 1958 July 26 Pioneer 3 1958 Dec. 6 Pioneer 4 1959 Mar. 3 Explorer 7 1959 Oct. 13 Injun 1 1961 June 29 Explorer 12 1961 Aug. 16 TRAAC 1961 Nov. 15 Mariner 2 1962 Aug. 27 Explorer 14 1962 Oct. 2 Explorer 15 1962 Oct. 27 Injun 3 1962 Dec. 12 OGO 1 1964 Sept. 5 Injun 4 (Explorer 25) 1964 Nov. 21 Mariner 4 1964 Nov. 28 OGO 2 1965 Oct. 14 Explorer 33 (AIMP-1, IMP-D) 1966 July 1 Explorer 34 (IMP 4, IMP-F) 1967 May 24 Mariner 5 1967 June 14 Explorer 35 (AIMP-2, IMP-E) 1967 July 19 OGO 4 1967 July 28 Injun 5 (Explorer 40) 1968 Aug. 8 Explorer 41 (IMP 5, IMP G) 1969 June 21 Pioneer 10 1972 Mar. 3 Pioneer 11 1973 Apr. 6 Hawkeye 1 1974 June 3
