Key statistics
Satellite ISS (ZARYA) at a glance.
Uptime
9797
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: INTERNATIONAL SPACE STATION (ISS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 92.885 minutes
Inclination: 51.6329 deg
SMA: 6793.956 km
Apoapsis: 418.763 km
Periapsis: 412.878 km
RAAN: 220.0184 deg
Eccentricy: 0.00043317
Argument of periapsis: 341.8913 deg
Mean anomaly: 18.1921 deg
Mean motion: 15.50310585 rev/day
Mean motion (dot): 0.00010865 rev/day2
B* drag term: 0.00019591888 1/REarth
Two-line elements (TLE)
Creation date: Sept. 15, 2025, 7:50 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 15, 2025, 9:11 a.m. UTC
TLE line 0: 0 ISS (ZARYA)
TLE line 1: 1 25544U 98067A 25258.38319791 .00010865 00000-0 19592-3 0 9992
TLE line 2: 2 25544 51.6329 220.0184 0004332 341.8913 18.1921 15.50310585529153
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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