Key statistics
Satellite SL-16 R/B at a glance.
Uptime
9549
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: 97.206 minutes
Inclination: 98.0282 deg
SMA: 7003.095 km
Apoapsis: 636.123 km
Periapsis: 613.797 km
RAAN: 303.9332 deg
Eccentricy: 0.00159402
Argument of periapsis: 130.5819 deg
Mean anomaly: 229.6783 deg
Mean motion: 14.81384263 rev/day
Mean motion (dot): 0.00001038 rev/day2
B* drag term: 0.00013943299 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, 8:43 p.m. UTC
TLE line 0: 0 SL-16 R/B
TLE line 1: 1 25861U 99039B 25249.86326711 .00001038 00000-0 13943-3 0 9993
TLE line 2: 2 25861 98.0282 303.9332 0015940 130.5819 229.6783 14.81384263409642
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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