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| Mission type | Technology |
|---|---|
| Operator | U.S. Air Force |
| COSPAR ID | 1963-025B |
| SATCAT no. | 614 |
| Spacecraft properties | |
| Bus | P-11 |
| Manufacturer | Lockheed Martin / MIT |
| Launch mass | 80 kilograms (180 lb) |
| Start of mission | |
| Launch date | June 27, 1963, 19:55 UTC[1] |
| Rocket | Thor-SLV2A Agena-D |
| Launch site | Vandenberg 75-1-2 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth |
| Eccentricity | 0.16898 |
| Perigee altitude | 330 kilometres (210 mi) |
| Apogee altitude | 3,060 kilometres (1,900 mi) |
| Inclination | 82.1° |
| Period | 120.3 minutes |
| Epoch | June 27, 1963 |
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Hitchhiker 1 (or Hitchhiker P-11 4201) was a satellite launched by U.S. Air Force on June 27, 1963. It was launched with the aim of studying and measuring cosmic radiation. The satellite was the first successful satellite of the P-11 program, following the failure of the first Hitchhiker satellite in March 1963.
- ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved May 31, 2018.