Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12552
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: 1991-041B
Object number (NORAD): 21419
Object ID (CCSDS): 21419
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 100.338 minutes
Inclination: 74.0368 deg
SMA: 7152.727 km
Apoapsis: 803.113 km
Periapsis: 746.07 km
RAAN: 120.4493 deg
Eccentricy: 0.0039875
Argument of periapsis: 22.1005 deg
Mean anomaly: 338.1855 deg
Mean motion: 14.35143428 rev/day
Mean motion (dot): 0.00000422 rev/day2
B* drag term: 0.00015563 1/REarth
Two-line elements (TLE)
Creation date: Oct. 22, 2025, 12:06 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 21, 2025, 8:14 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21419U 91041B 25294.84309564 .00000422 00000-0 15563-3 0 9994
TLE line 2: 2 21419 74.0368 120.4493 0039875 22.1005 338.1855 14.35143428797193
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 49’, on board a Kosmos-3M space rocket.
The launch took place on June 11, 1991, 5:41 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Strela-2M 49
Agency: N/A
Status: Launch Successful
Launch date: June 11, 1991, 5:41 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
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