Key statistics
Satellite SL-8 R/B at a glance.
Uptime
17523
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: 1977-087B
Object number (NORAD): 10355
Object ID (CCSDS): 10355
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.648 minutes
Inclination: 82.9754 deg
SMA: 7356.096 km
Apoapsis: 1001.75 km
Periapsis: 954.173 km
RAAN: 351.3236 deg
Eccentricy: 0.00323389
Argument of periapsis: 305.9392 deg
Mean anomaly: 72.5238 deg
Mean motion: 13.7604188 rev/day
Mean motion (dot): 0.00000085 rev/day2
B* drag term: 0.000072097156 1/REarth
Two-line elements (TLE)
Creation date: Sept. 3, 2025, 10:15 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 3, 2025, 6:41 a.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 10355U 77087B 25246.27901294 .00000085 00000-0 72097-4 0 9998
TLE line 2: 2 10355 82.9754 351.3236 0032339 305.9392 72.5238 13.76041880407933
Live tracking on map
Real-time ground track for satellite SL-8 R/B.
Associated space launch
The soviet Zenit-2M (Gektor, 11F690) was an improved version of the Zenit-2 area surveillance reconnaissance satellite. It was part of the Vostok-based Zenit-family.
SL-8 R/B was lifted into orbit during the mission ‘Soyuz U | Zenit-2M 81’, on board a Soyuz U space rocket.
The launch took place on Sept. 13, 1977, 3:10 p.m. from 43/3 (43L).
For more information about the launch, click the button.
Soyuz U | Zenit-2M 81
Agency: N/A
Status: Launch Successful
Launch date: Sept. 13, 1977, 3:10 p.m. UTC
Rocket: Soyuz U
Launch pad: 43/3 (43L)
Location: Plesetsk Cosmodrome, Russian Federation
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