Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12608
Days in orbit
Revolutions
≈ 13.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
83.0
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: 1991-029B
Object number (NORAD): 21231
Object ID (CCSDS): 21231
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.644 minutes
Inclination: 82.9565 deg
SMA: 7355.918 km
Apoapsis: 1003.601 km
Periapsis: 951.964 km
RAAN: 10.7413 deg
Eccentricy: 0.00350991
Argument of periapsis: 356.1934 deg
Mean anomaly: 121.6265 deg
Mean motion: 13.76091976 rev/day
Mean motion (dot): 0.0000012 rev/day2
B* drag term: 0.00010720248 1/REarth
Two-line elements (TLE)
Creation date: Oct. 21, 2025, 3:26 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 20, 2025, 6:32 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21231U 91029B 25293.77254558 .00000120 00000-0 10720-3 0 9990
TLE line 2: 2 21231 82.9565 10.7413 0035099 356.1934 121.6265 13.76091976732597
Live tracking on map
Real-time ground track for satellite SL-8 R/B.
Associated space launch
Navigation satellite providing location information for the Tsiklon-B navigation system
SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Parus 72’, on board a Kosmos-3M space rocket.
The launch took place on April 16, 1991, 7:21 a.m. from 132/1 (132L).
For more information about the launch, click the button.
Kosmos-3M | Parus 72
Agency: N/A
Status: Launch Successful
Launch date: April 16, 1991, 7:21 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/1 (132L)
Location: Plesetsk Cosmodrome, Russian Federation
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