Key statistics
Satellite ISS (ZARYA) at a glance.
Uptime
9889
Days in orbit
Revolutions
≈ 15.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
51.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for ISS (ZARYA).
Object identification
Identified? True
Debris? False
Object name: ISS (ZARYA)
International designator: 1998-067A
Object number (NORAD): 25544
Object ID (CCSDS): 25544
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 92.926 minutes
Inclination: 51.6308 deg
SMA: 6795.956 km
Apoapsis: 419.981 km
Periapsis: 415.661 km
RAAN: 122.0659 deg
Eccentricy: 0.00031782
Argument of periapsis: 259.3256 deg
Mean anomaly: 100.7375 deg
Mean motion: 15.49626059 rev/day
Mean motion (dot): 0.00007581 rev/day2
B* drag term: 0.00014251236 1/REarth
Two-line elements (TLE)
Creation date: Dec. 17, 2025, 2:25 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 16, 2025, 8:41 p.m. UTC
TLE line 0: 0 ISS (ZARYA)
TLE line 1: 1 25544U 98067A 25350.86195802 .00007581 00000-0 14251-3 0 9991
TLE line 2: 2 25544 51.6308 122.0659 0003178 259.3256 100.7375 15.49626059543496
Live tracking on map
Real-time ground track for satellite ISS (ZARYA).
In-orbit conjunctions
There are no conjunctions computed for ISS (ZARYA), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
The Zarya Control Module, also known by the technical term Functional Cargo Block and the Russian acronym FGB, was the first component launched for the International Space Station. This module was designed to provide the station's initial propulsion and power. The 19,323 kilogram pressurized module was launched on a Russian Proton rocket in November 1998.
ISS (ZARYA) was lifted into orbit during the mission ‘Proton | Zarya’, on board a Proton space rocket.
The launch took place on Nov. 20, 1998, 6:40 a.m. from 81/23 (81L).
For more information about the launch, click the button.
Proton | Zarya
Agency: N/A
Status: Launch Successful
Launch date: Nov. 20, 1998, 6:40 a.m. UTC
Rocket: Proton
Launch pad: 81/23 (81L)
Location: Baikonur Cosmodrome, Republic of Kazakhstan
...
Latest news about this satellite
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