Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12634
Days in orbit
Revolutions
≈ 13.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
82.9
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: 1991-007B
Object number (NORAD): 21090
Object ID (CCSDS): 21090
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.603 minutes
Inclination: 82.9242 deg
SMA: 7353.997 km
Apoapsis: 990.017 km
Periapsis: 961.706 km
RAAN: 160.6399 deg
Eccentricy: 0.00192489
Argument of periapsis: 276.6105 deg
Mean anomaly: 83.2861 deg
Mean motion: 13.76631214 rev/day
Mean motion (dot): 0.00000088 rev/day2
B* drag term: 0.000074151602 1/REarth
Two-line elements (TLE)
Creation date: Sept. 8, 2025, 3:16 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 7, 2025, 9:14 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21090U 91007B 25250.88478710 .00000088 00000-0 74152-4 0 9995
TLE line 2: 2 21090 82.9242 160.6399 0019249 276.6105 83.2861 13.76631214737062
Live tracking on map
Real-time ground track for satellite SL-8 R/B.
Associated space launch
Civilian navigation satellite equivalent to the purely military Parus
SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Tsikada 17’, on board a Kosmos-3M space rocket.
The launch took place on Feb. 5, 1991, 2:36 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Tsikada 17
Agency: N/A
Status: Launch Successful
Launch date: Feb. 5, 1991, 2:36 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
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