Key statistics
Satellite SL-8 R/B at a glance.
Uptime
16291
Days in orbit
Revolutions
≈ 14.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.1
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: 1981-041B
Object number (NORAD): 12443
Object ID (CCSDS): 12443
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 100.28 minutes
Inclination: 74.054 deg
SMA: 7149.944 km
Apoapsis: 775.571 km
Periapsis: 768.046 km
RAAN: 251.8589 deg
Eccentricy: 0.00052626
Argument of periapsis: 297.0213 deg
Mean anomaly: 63.0402 deg
Mean motion: 14.35981456 rev/day
Mean motion (dot): 0.00000398 rev/day2
B* drag term: 0.00014606784 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 4:32 a.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 12443U 81041B 25346.18906369 .00000398 00000-0 14607-3 0 9991
TLE line 2: 2 12443 74.0540 251.8589 0005263 297.0213 63.0402 14.35981456332407
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 24’, on board a Kosmos-3M space rocket.
The launch took place on May 7, 1981, 1:21 p.m. from 132/1 (132L).
For more information about the launch, click the button.
Kosmos-3M | Strela-2M 24
Agency: N/A
Status: Launch Successful
Launch date: May 7, 1981, 1:21 p.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/1 (132L)
Location: Plesetsk Cosmodrome, Russian Federation
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