Key statistics
Satellite SL-8 DEB at a glance.
Uptime
12731
Days in orbit
Revolutions
≈ 12.3
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-8 DEB.
Object identification
Identified? True
Debris? True
Object name: SL-8 DEB
International designator: 1991-009AK
Object number (NORAD): 21172
Object ID (CCSDS): 21172
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 117.291 minutes
Inclination: 74.0314 deg
SMA: 7937.226 km
Apoapsis: 1665.489 km
Periapsis: 1452.694 km
RAAN: 171.302 deg
Eccentricy: 0.01340493
Argument of periapsis: 262.7454 deg
Mean anomaly: 120.7635 deg
Mean motion: 12.27720772 rev/day
Mean motion (dot): -0.00000019 rev/day2
B* drag term: -0.000025302326 1/REarth
Two-line elements (TLE)
Creation date: Dec. 20, 2025, 5:42 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 20, 2025, 10:56 a.m. UTC
TLE line 0: 0 SL-8 DEB
TLE line 1: 1 21172U 91009AK 25354.45618471 -.00000019 00000-0 -25302-4 0 9995
TLE line 2: 2 21172 74.0314 171.3020 0134049 262.7454 120.7635 12.27720772559313
Live tracking on map
Real-time ground track for satellite SL-8 DEB.
In-orbit conjunctions
There are no conjunctions computed for SL-8 DEB, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Military communications satellites
SL-8 DEB was lifted into orbit during the mission ‘Kosmos-3M | Strela-1M 353-360’, on board a Kosmos-3M space rocket.
The launch took place on Feb. 12, 1991, 2:44 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Strela-1M 353-360
Agency: N/A
Status: Launch Successful
Launch date: Feb. 12, 1991, 2:44 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
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Latest news about this satellite
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