Space craft engaged in investigation of spaceflight techniques and technology.

Typical orbit: 131 km x 261 km at 97 degrees inclination. Mass: 7.00 kg (15.40 lb). Associated Launch Vehicle: SLV-3 Atlas / Agena D.

• 1966 February 15 - Bluebell 2C (Cylinder) - Launch Site: Vandenberg. Launch Vehicle: SLV-3 Atlas / Agena D. Mass: 9.00 kg (19.80 lb). Perigee: 115 km (71 mi). Apogee: 253 km (157 mi). Inclination: 96.50 deg. Period: 88.10 min.

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

• 1966 February 15 - Bluebell 2S (Sphere) - Launch Site: Vandenberg. Launch Vehicle: SLV-3 Atlas / Agena D. Mass: 4.00 kg (8.80 lb). Perigee: 147 km (91 mi). Apogee: 268 km (166 mi). Inclination: 96.50 deg. Period: 88.60 min.

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

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

• 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.