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 Replica of Sputnik 1 | |
| Names | Спутник-1 |
|---|---|
| Mission type | Technology demonstration |
| Operator | OKB-1 |
| Harvard designation | 1957 Alpha 2 |
| COSPAR ID | 1957-001B |
| SATCAT no. | 00002 |
| Mission duration | 21 days |
| Orbits completed | 1440 |
| Spacecraft properties | |
| Manufacturer | OKB-1 Ministry of Radiotechnical Industry |
| Launch mass | 83.6 kg (184 lb) |
| Dimensions | 58 cm (23 in) diameter |
| Power | 1 watt |
| Start of mission | |
| Launch date | 4 October 1957, 19:28:34 UTC |
| Rocket | Sputnik 8K71PS |
| Launch site | Baikonur 1/5 |
| End of mission | |
| Disposal | Orbital decay |
| Last contact | 26 October 1957 |
| Decay date | 4 January 1958 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Semi-major axis | 6,955 km (4,322 mi) |
| Eccentricity | 0.05201 |
| Perigee | 215 km (134 mi) |
| Apogee | 939 km (583 mi) |
| Inclination | 65.1° |
| Period | 96.2 minutes |
| Epoch | 4 October 1957, 15:12 UTC |
| Instruments | |
| Radio transmitter (20.005 MHz - 40.002 MHz) | |
Sputnik 1 was the first artificial satellite to go around the Earth. It was made by the Soviet Union. It was launched on 4 October 1957 at Baikonur Cosmodrome. It orbited (went around) the Earth for three months. It carried a radio transmitter. It did 1,440 orbits of the Earth during this time. It went down into Earth's atmosphere on 4 January 1958 and burned up.
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