| Name of the satellite | Explorer 12 |
|---|---|
| Other name(s) | EPE-A S 3 00170 |
| COSPAR designation | 61-020A |
| Project(s) Manager(s) of the satellite | Paul Butler (retired) |
| Institute of the project(s) manager(s) | NASA-GSFC |
| Country or Space Agency | USA |
| Link(s) to Web site(s) | http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1961-020A |
| Launch date (dd-mm-yyyy) | 16-08-1961 |
| Termination date (dd-mm-yyyy) | 30-09-1963 |
| Lifetime of the satellite (month) | 25 |
| Type of the orbits | HEO |
| (Initial) Perigee (km) | 790 |
| (Initial) Apogee (km / Re) | 76620 / 12 |
| Orbital period (min / hour) | 1587 / 26.5 |
| Spin rate (rpm) | 28 -> 34.3 |
| Eccentricity | 0.84091 |
| Inclination (°) | 33.4 |
| Observed regions | Magnetosphere (in particular the sunlit side of the Earth) |
| Observed waves | ***** |
| Name of the experiment | Fluxgate Magnetometers |