SPUTNIK 1

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Sputnik 1
"Спутник-1"
Major contractors OKB-1, Soviet Ministry of Radiotechnical Industry
Mission type Atmospheric studies
Satellite of Earth
Orbits 1,440
Launch date 19:28:34, October 4, 1957 (UTC) (1957-10-04T19:28:34Z) (22:28:34 MSK)
Launch vehicle R-7 Rocket
Mission duration 3 months
Orbital decay 4 January 1958
COSPAR ID 1957-001B
Home page NASA NSSDC Master Catalog
Mass 83.6 kg (184.3 lb)
Semimajor axis 6,955.2 km (4,321.8 mi)
Eccentricity 0.05201
Inclination 65.1°
Orbital period 96.2 minutes
Apoapsis 7,310 km (4,540 mi) from centre, 939 km (583 mi) from surface
Periapsis 6,586 km (4,092 mi) from centre, 215 km (134 mi) from surface