Sputnik 3
| Sputnik 3 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Phase : F / Status : burned out | ||||||||||
 Model of the Sputnik 3 |
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| Type: | Research satellite | |||||||||
| Country: |
 Soviet Union
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| Organization: | OKB 1 | |||||||||
| COSPAR designation : | 1958-004B | |||||||||
| NORAD / SCN-ID : | 8th | |||||||||
| Mission dates | ||||||||||
| Start date: | May 15, 1958, 07:12:00 UTC | |||||||||
| Starting place: | Baikonur starting place 1 | |||||||||
| Launcher: | Sputnik (8A91) | |||||||||
| Mission duration: | 692 days | |||||||||
| End date: | April 6, 1960 | |||||||||
| Orbit data | ||||||||||
| Origin of coordinates: | earth | |||||||||
| Rotation time : | 105.9 min | |||||||||
| Apogee : | 1,864 km | |||||||||
| Perigee : | 217 km | |||||||||
| Eccentricity : | 0.110932 | |||||||||
| Orbit inclination : | 65.18 ° | |||||||||
| General spacecraft data | ||||||||||
| Takeoff mass: | 1,327 kg | |||||||||
| Dimensions: | conical body (length: 3.57 m, diameter: 1.73 m) | |||||||||
| Others | ||||||||||
| Previous mission: |
Vanguard TV5 | |||||||||
| Subsequent mission: |
Vanguard SLV1 | |||||||||
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Sputnik 3 (also known as D1-2 ) was a Soviet research satellite from the Sputnik series.
technology
At 1327 kg it was the heaviest and most complex satellite built to date. Since it was too heavy for the Sputnik launch rocket version 8K71PS, with which Sputnik 1 and Sputnik 2 were launched, OKB 1 , the supplier of the Sputnik rocket , developed a new version, the Sputnik 8A91. The 8A91 was a transition construction between the first test model of the R-7 (8K71) and the operational R-7A (8K74). Improvements in manufacturing processes have been used to reduce the thickness of the baffles in the fuel tanks, thereby reducing weight. The engines were a little more powerful and the mass changes led to changes in the flight plan - the four side boosters were throttled by 25% before being released. Sputnik 3 consisted of a conical pressure body. The lifespan was estimated to be around 1 month as it was powered by batteries. There were no stabilization systems. A cassette recorder recorded the data and enabled the playback of data from parts of the orbit beyond the range of ground stations. The scientific instruments included a magnetometer and a field mill electrometer for measuring fields in space, four space radiation detectors for examining cosmic and solar particle radiation, a mass spectrometer and two pressure gauges for analyzing the dilute outer atmosphere, an ion trap for measuring plasma and a piezoelectric microphone for measuring Counting micrometeorite hits. There was also an experimental solar battery on board that powered one of the transmitters.
History / flight history
After the actual Sputnik 3 was lost in a false start on April 27, 1958, this mission was renamed Sputnik (3) and a replacement satellite was built.
Sputnik 3 was finally on an on May 15, 1958 Sputnik - launch vehicle from the Baikonur Cosmodrome in a low earth orbit brought. From there he worked for about a month until his batteries ran out and the mission was ended.
Sputnik 3 entered the earth's atmosphere on April 6, 1960 and burned up.
swell
- Sputnik 3 (D-1 # 1, 2) at Gunter's Space Page (English)
- Statistics on all starts of the R-7 at bernd-leitenberger.de