Key statistics
Satellite SL-8 DEB at a glance.
Uptime
12729
Days in orbit
Revolutions
≈ 12.2
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.1
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: 1991-009BK
Object number (NORAD): 21252
Object ID (CCSDS): 21252
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: SMALL
Orbital parameters
Period: 117.554 minutes
Inclination: 74.1069 deg
SMA: 7949.114 km
Apoapsis: 1672.807 km
Periapsis: 1469.151 km
RAAN: 345.618 deg
Eccentricy: 0.01280997
Argument of periapsis: 293.8948 deg
Mean anomaly: 225.1063 deg
Mean motion: 12.24967807 rev/day
Mean motion (dot): 0.00000043 rev/day2
B* drag term: 0.00051184101 1/REarth
Two-line elements (TLE)
Creation date: Dec. 18, 2025, 8:02 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 18, 2025, 11:24 a.m. UTC
TLE line 0: 0 SL-8 DEB
TLE line 1: 1 21252U 91009BK 25352.47551834 .00000043 00000-0 51184-3 0 9994
TLE line 2: 2 21252 74.1069 345.6180 0128100 293.8948 225.1063 12.24967807554877
Live tracking on map
Real-time ground track for satellite SL-8 DEB.
Associated 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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