Key statistics
Satellite SL-8 R/B at a glance.
Uptime
12640
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: 1991-006B
Object number (NORAD): 21088
Object ID (CCSDS): 21088
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.539 minutes
Inclination: 82.9427 deg
SMA: 7351.009 km
Apoapsis: 989.337 km
Periapsis: 956.412 km
RAAN: 306.738 deg
Eccentricy: 0.00223951
Argument of periapsis: 186.35 deg
Mean anomaly: 348.199 deg
Mean motion: 13.77470464 rev/day
Mean motion (dot): 0.00000071 rev/day2
B* drag term: 0.000056067396 1/REarth
Two-line elements (TLE)
Creation date: Sept. 7, 2025, 3:09 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 6, 2025, 10:45 p.m. UTC
TLE line 0: 0 SL-8 R/B
TLE line 1: 1 21088U 91006B 25249.94799749 .00000071 00000-0 56067-4 0 9991
TLE line 2: 2 21088 82.9427 306.7380 0022395 186.3500 348.1990 13.77470464738773
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
Informator 1 was a prototype communications satellite for the Koskon (Space Conversion) Global Space Communication System to collect and transmit data from several scientific stations with an additional radio amateur hosted payload. It was launched on 29 January 1991 from the Plesetsk Cosmodrome by a Kosmos-3M launch vehicle.
SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Informator-1’, on board a Kosmos-3M space rocket.
The launch took place on Jan. 29, 1991, 11:59 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Informator-1
Agency: N/A
Status: Launch Successful
Launch date: Jan. 29, 1991, 11:59 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
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