Key statistics
Satellite SL-16 R/B at a glance.
Uptime
9488
Days in orbit
Revolutions
≈ 14.8
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-16 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-16 R/B
International designator: 1999-039B
Object number (NORAD): 25861
Object ID (CCSDS): 25861
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 97.212 minutes
Inclination: 98.0348 deg
SMA: 7003.342 km
Apoapsis: 635.192 km
Periapsis: 615.223 km
RAAN: 242.7994 deg
Eccentricy: 0.0014257
Argument of periapsis: 336.4127 deg
Mean anomaly: 23.643 deg
Mean motion: 14.8130582 rev/day
Mean motion (dot): 0.00000381 rev/day2
B* drag term: 0.000055688 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, 8:49 p.m. UTC
TLE line 0: 0 SL-16 R/B
TLE line 1: 1 25861U 99039B 25188.86782208 .00000381 00000-0 55688-4 0 9995
TLE line 2: 2 25861 98.0348 242.7994 0014257 336.4127 23.6430 14.81305820400619
Live tracking on map
Real-time ground track for satellite SL-16 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SL-16 R/B.
Associated space launch
Okean-O was a joint Ukrainian and Russian remote sensing satellite program designed as a follow on to the Okean-O1 series. It was designed to gather remote sensing data crucial for research of natural resources of the Earth and world oceans. The mission also included ecological monitoring and management of externalities (weather forecast, hazards prevention).
SL-16 R/B was lifted into orbit during the mission ‘Zenit-2 | Okean-O’, on board a Zenit-2 space rocket.
The launch took place on July 17, 1999, 5:38 a.m. from 45/1.
For more information about the launch, click the button.
Zenit-2 | Okean-O
Agency: N/A
Status: Launch Successful
Launch date: July 17, 1999, 5:38 a.m. UTC
Rocket: Zenit-2
Launch pad: 45/1
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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