Key statistics
Satellite SL-3 R/B at a glance.
Uptime
12473
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
99.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-3 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-3 R/B
International designator: 1991-061B
Object number (NORAD): 21689
Object ID (CCSDS): 21689
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 102.692 minutes
Inclination: 99.4675 deg
SMA: 7264.137 km
Apoapsis: 904.628 km
Periapsis: 867.376 km
RAAN: 133.069 deg
Eccentricy: 0.0025641
Argument of periapsis: 13.5785 deg
Mean anomaly: 346.6064 deg
Mean motion: 14.02254199 rev/day
Mean motion (dot): 0.00000193 rev/day2
B* drag term: 0.00015714 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, 6:42 p.m. UTC
TLE line 0: 0 SL-3 R/B
TLE line 1: 1 21689U 91061B 25294.77954897 .00000193 00000-0 15714-3 0 9995
TLE line 2: 2 21689 99.4675 133.0690 0025641 13.5785 346.6064 14.02254199746640
Live tracking on map
Real-time ground track for satellite SL-3 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SL-3 R/B.
Associated space launch
Indian remote sensing satellite
SL-3 R/B was lifted into orbit during the mission ‘Vostok 8A92M | IRS-1B’, on board a Vostok 8A92M space rocket.
The launch took place on Aug. 29, 1991, 6:48 a.m. from 31/6.
For more information about the launch, click the button.
Vostok 8A92M | IRS-1B
Agency: N/A
Status: Launch Successful
Launch date: Aug. 29, 1991, 6:48 a.m. UTC
Rocket: Vostok 8A92M
Launch pad: 31/6
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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