Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12628
Days in orbit
Revolutions
≈ 14.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-8 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-8 R/B
International designator: 1990-111B
Object number (NORAD): 21015
Object ID (CCSDS): 21015
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 100.202 minutes
Inclination: 74.0496 deg
SMA: 7146.25 km
Apoapsis: 782.957 km
Periapsis: 753.273 km
RAAN: 140.7872 deg
Eccentricy: 0.0020769
Argument of periapsis: 34.6971 deg
Mean anomaly: 325.5533 deg
Mean motion: 14.37094978 rev/day
Mean motion (dot): 0.0000014 rev/day2
B* drag term: 0.000055717 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 6:05 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 7:33 a.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21015U 90111B 25187.31520157 .00000140 00000-0 55717-4 0 9992
TLE line 2: 2 21015 74.0496 140.7872 0020769 34.6971 325.5533 14.37094978908111
Live tracking on map
Real-time ground track for satellite SL-8 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SL-8 R/B.
Associated space launch
Military communications satellite
SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Strela-2M 48’, on board a Kosmos-3M space rocket.
The launch took place on Dec. 10, 1990, 7:54 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Strela-2M 48
Agency: N/A
Status: Launch Successful
Launch date: Dec. 10, 1990, 7:54 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
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