1960-001
NASA's P-02 probe was launched at 1300:05 on 1960 Mar 11 by Thor Able IV from pad 17A at Cape Canaveral. The Thor cutoff came at T+2:40, followed by the Able stage burn which ended at T+4:20. The Altair third stage then fired for 40s to reach 11.125 km/s. Pioneer V was now in solar orbit, with a 312 day period. It transmitted until Jun 23. Pioneer V reached perihelion on Aug 10 and aphelion on 1961 Jan 31.
Mass was 43 kg. P-2 was built by STL under contract to AFBMD, which provided "technical assistance" to NASA. Control from AFBMD/Los Angeles.
In the launch press release, P-2 was considered the third 'paddlewheel' payload, following P-3 and S-2 (Explorer 6).
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| Pioneer 5 |
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| Date | Time | Event | Orbit |
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| 1960 Mar 11 | 1300:05 | Launch by Thor Able IV |
| | 1302 | T+2:40 Thor cutoff |
| | 1302 | Able burn |
| | 1304:25 | T+4:20 Able SECO | -1000?? x 200? x ? |
| | 1304:30? | Altair burn 40s |
| | 1305:10? | Altair burnout |
| | 1305 | Altair sep | 11.125 km/s |
| | 1320 | Command Altair sep |
| 1960 Jun 23 | | End of tx |
| 1960 Aug 10 | | Perihelion |
Payload:
- Micrometeorites (AFCRC/)
- Search coil magnetometer (STL/)
- High energy radiation counter (Chicago/)
- Total Radiation Flux (GM tube and ionization chamber) (Minnesota/)
- UHF Transmitter (test of interplanetary communication)