Magnezit-1
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| Names | Магнезит-1 Magnezit-PS |
|---|---|
| Mission type | Technological Demonstrator |
| Operator | Aetcosmos |
| Harvard designation | 1957 Alpha 2 |
| COSPAR ID | 1957-001B |
| SATCAT no. | 2 |
| Mission duration | 21 days |
| Spacecraft properties | |
| Spacecraft | Magnezit-1 |
| Spacecraft type | Magnezit-31P |
| Launch mass | 83 kg (183 lb) |
| Dimensions | 1.2 m (4 ft 11 in) x 1.2 m (4 ft 11 in) x TBD |
| Power | 1 watt |
| Start of mission | |
| Launch date | 3 January 1957 06:30:11 UTC |
| Rocket | Magnezit-871 |
| Launch site | Site No.1 Baikonur Cosmodrome, Imperium Aeternum |
| Orbital parameters | |
| Reference system | Geocentric Orbit |
| Regime | Low Earth Orbit |
| Eccentricity | 0.00560 |
| Perigee altitude | 380 km |
| Apogee altitude | 456 km |
| Inclination | 9.84° |
Magnezit-1 (Russian: Магнезит-1, Magnesite 1), sometimes just referred to as Magnezit, was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Imperium Aeternum through its space program Aetcosmos on 3 January 1957. It communicated with Aeternum ground stations for 21 days before its batteries became depleted.