Key statistics
Satellite SL-8 R/B at a glance.
Uptime
17576
Days in orbit
Revolutions
≈ 13.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
82.9
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: 1977-039B
Object number (NORAD): 10020
Object ID (CCSDS): 10020
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.473 minutes
Inclination: 82.9466 deg
SMA: 7347.889 km
Apoapsis: 992.154 km
Periapsis: 947.353 km
RAAN: 332.9102 deg
Eccentricy: 0.0030486
Argument of periapsis: 339.9294 deg
Mean anomaly: 20.0662 deg
Mean motion: 13.78348129 rev/day
Mean motion (dot): 0.00000091 rev/day2
B* drag term: 0.000074581 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 9:02 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 10020U 77039B 25188.87683535 .00000091 00000-0 74581-4 0 9997
TLE line 2: 2 10020 82.9466 332.9102 0030486 339.9294 20.0662 13.78348129418915
Live tracking on map
Real-time ground track for satellite SL-8 R/B.
Associated space launch
The Sfera or Geoid series were the first soviet geodetic satellites to improve the accuracy of maps. The development of the satellites started in 1965 at NPO-PM.
SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Sfera 16’, on board a Kosmos-3M space rocket.
The launch took place on May 25, 1977, 11 a.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | Sfera 16
Agency: N/A
Status: Launch Successful
Launch date: May 25, 1977, 11 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
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