Injun
Class: Earth. Type: Magnetosphere. Nation: USA. Agency: U.S. Air Force, U.S. Navy.

Radiation decay data satellite. May also have been a cover for some NRL ELINT satellites.

Typical orbit: 480 km x 2416 km at 70.3 to 81.4 degrees inclinati. Associated Launch Vehicle: Scout B, Scout X-4, Thor Able-Star, Thor Agena D.


Injun Chronology
  • 1961 June 29 - Injun 1 - Launch Site: Cape Canaveral. Launch Vehicle: Thor Able-Star. Mass: 25 kg (55 lb). Perigee: 869 km (539 mi). Apogee: 992 km (616 mi). Inclination: 66.80 deg. Period: 103.60 min.

    Dual launch; failed to separate from Solrad 3; still returned radiation data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

  • 1962 December 13 - Injun 3 - Launch Site: Vandenberg. Launch Vehicle: Thor Agena D. Mass: 52 kg (114 lb). Perigee: 240 km (140 mi). Apogee: 2,406 km (1,495 mi). Inclination: 70.30 deg. Period: 112.10 min.

    Radiation decay data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

  • 1964 November 21 - Explorer 25 - Program: Explorer. Launch Site: Vandenberg. Launch Vehicle: Scout X-4. Mass: 40 kg (88 lb). Perigee: 526 km (326 mi). Apogee: 2,319 km (1,440 mi). Inclination: 81.30 deg. Period: 114.30 min.

    Radiation data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

  • 1968 August 8 - Explorer 40 - Program: Explorer. Launch Site: Vandenberg. Launch Vehicle: Scout B. Mass: 70 kg (154 lb). Perigee: 679 km (421 mi). Apogee: 2,489 km (1,546 mi). Inclination: 80.70 deg. Period: 117.80 min.

    Injun Explorer; radiation data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).


Bibliography and Further Reading
  • McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 20,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.
 
 
 
 
 
 
 
 
 

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