Key statistics
Satellite SL-8 R/B at a glance.
Uptime
17592
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: 1977-059B
Object number (NORAD): 10121
Object ID (CCSDS): 10121
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 100.194 minutes
Inclination: 74.0468 deg
SMA: 7145.871 km
Apoapsis: 780.892 km
Periapsis: 754.58 km
RAAN: 34.3736 deg
Eccentricy: 0.00184109
Argument of periapsis: 3.1401 deg
Mean anomaly: 356.9864 deg
Mean motion: 14.37209167 rev/day
Mean motion (dot): 0.00000263 rev/day2
B* drag term: 0.000097007716 1/REarth
Two-line elements (TLE)
Creation date: Aug. 30, 2025, 3:38 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Aug. 29, 2025, 8 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 10121U 77059B 25241.83363143 .00000263 00000-0 97008-4 0 9997
TLE line 2: 2 10121 74.0468 34.3736 0018411 3.1401 356.9864 14.37209167519631
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 15’, on board a Kosmos-3M space rocket.
The launch took place on July 1, 1977, 11:52 a.m. from 132/1 (132L).
For more information about the launch, click the button.
Kosmos-3M | Strela-2M 15
Agency: N/A
Status: Launch Successful
Launch date: July 1, 1977, 11:52 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/1 (132L)
Location: Plesetsk Cosmodrome, Russian Federation
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