Key statistics
Satellite SL-1 R/B at a glance.
Uptime
58
Days in orbit
Revolutions
N/A
Per day
Orbit
LEO
Low Earth Orbit
Inclination
N/A
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-1 R/B.
Object identification
Object name: SL-1 R/B
International designator: 1957-001A
Object number (NORAD): 1
Object ID (CCSDS): 1
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Decay date: Dec. 1, 1957
Inclination: 65.1 deg
Period: 96.19 minutes
Apoapsis: 938.0 km
Periapsis: 214.0 km
Two-line elements (TLE)
No TLE available, as this satellite has decayed and is no longer in orbit.
Live tracking on map
Satellite SL-1 R/B has decayed and is no longer in orbit. No tracking available.
Associated space launch
First artificial satellite consisting of a 58 cm pressurized aluminium shell containing two 1 W transmitters for a total mass of 83.6 kg.
SL-1 R/B was lifted into orbit during the mission ‘Sputnik 8K74PS | Sputnik 1’, on board a Sputnik 8K74PS space rocket.
The launch took place on Oct. 4, 1957, 7:28 p.m. from 1/5.
For more information about the launch, click the button.

Sputnik 8K74PS | Sputnik 1
Agency: N/A
Status: Launch Successful
Launch date: Oct. 4, 1957, 7:28 p.m. UTC
Rocket: Sputnik 8K74PS
Launch pad: 1/5
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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