Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12562
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: 104.645 minutes
Inclination: 82.9511 deg
SMA: 7355.945 km
Apoapsis: 1004.656 km
Periapsis: 950.965 km
RAAN: 43.985 deg
Eccentricy: 0.00364949
Argument of periapsis: 118.3906 deg
Mean anomaly: 352.0441 deg
Mean motion: 13.76084309 rev/day
Mean motion (dot): 0.00000099 rev/day2
B* drag term: 0.000085612175 1/REarth
Two-line elements (TLE)
Creation date: Sept. 6, 2025, 2:09 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 5, 2025, 9:48 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21231U 91029B 25248.90847865 .00000099 00000-0 85612-4 0 9992
TLE line 2: 2 21231 82.9511 43.9850 0036495 118.3906 352.0441 13.76084309726422
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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