Space craft engaged in investigation of spaceflight techniques and technology.

Typical orbit: 133 km x 1970 km at 92 degrees inclination. Mass: 364 kg (802 lb). Associated Launch Vehicle: Atlas F.

• 1971 August 7 - Cannonball 2 - Launch Site: Vandenberg. Launch Vehicle: Atlas F. Mass: 364 kg (802 lb). Perigee: 133 km (82 mi). Apogee: 1,970 km (1,220 mi). Inclination: 92.00 deg. Period: 106.30 min.

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

• 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.

• Krebs, Gunter, Gunter's Space Page, University of Frankfurt, 1996. Accessed at: http://www.skyrocket.de/space.

• JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Accessed at: http://msl.jpl.nasa.gov/home.html.

• Lockheed Martin Coporation, Atlas Family Fact Sheets, September 1998.. Accessed at: http://www.lmco.com/ILS/txtmain/ils_lsysinfo.htm.

• McDowell, Jonathan, Launch Log, October 1998. Jonathan McDowell's complete on-line listing of all objects orbited since Sputnik. Accessed at: http://hea-www.harvard.edu/~jcm/space/log/launch.html.

• USAF Satellite Database, USAF Institute of Technology, 1995. Accessed at: ftp://archive.afit.af.mil/pub/space/.