ISS (ZARYA), 25544

Orbit data source: Space-Track

The International Space Station (ISS) is a collaborative project involving NASA, Roscosmos, ESA, JAXA, and CSA. It is the largest human-made structure in low Earth orbit (LEO). It serves as a microgravity laboratory where scientific research is conducted in various fields, such as astrobiology, astronomy, meteorology, and physics. Astronauts have continuously inhabited the ISS since Nov 2000, and the space station supports testing spacecraft systems and equipment needed for long-duration missions to the Moon and Mars.

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Identifier
25544, 1998-067A
Orbit
LEO
Last TLE update
6 hours ago
Origin
Manufacturer
Khrunichev
Mission
Operational Civil Spaceship
Bus & Motor
77KS, Unknown motor
Mass
20,351 kg wet, ~19,000 kg dry
Launch date (UTC)
1998-11-20 (27 years ago)
Launch vehicle
PROTON-K
Launch site
Tyuratam Missile And Space Complex (TTMTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cyl + 2 Pan, 109 m
Radar Cross Section
160.273 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 6 hours ago
0 ISS (ZARYA)
1 25544U 98067A   25186.50618345  .00006730  00000-0  12412-3 0  9993
2 25544  51.6343 216.2777 0002492 336.9059  23.1817 15.50384048518002
Epoch: 2025-07-05T12:08Z
TLE epoch observation values (Epoch: 2025-07-05T12:08:54.25Z)
Latitude
-0.00005°
Longitude
110.30837°
Altitude
414.789 km
Speed
7.664 km/s
True Right ascension
14h 25m 06s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
26.93157°
Longitude
132.57146°
Altitude
415.751 km
Speed
7.666 km/s
Apparent Right ascension
17h 01m 10s
Apparent Declination
-5° 33' 48"
Sunlit
Object is in full shadow
Visualization observer readout
Local Sidereal Time
06:24:45
Azimuth
34.203° NE
Elevation
-50.839°
Doppler factor
1
Orbital elements
Apogee altitude
417.806 km
Perigee altitude
414.42 km
Semi-major axis
6,794.25 km
Eccentricity
0.00025
Inclination
51.6343°
RAAN
216.2777°
Arg. of periapsis
336.9059°
True anomaly
Unknown
Mean anomaly
23.1817°
Eccentric anomaly
Unknown
Mean motion
3.87553 °/min
Orbital period
92.89 mins
BSTAR
0.00012412
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ISS (ZARYA) Visibility forecast

Observer location: undefined°, undefined°

Span
Click to sort rows by Start time (UTC) header in descending order
Start Az.
Max El. time (UTC)
Max El. Az.
Max El.
End time (UTC)
End Az.
5 mins2025-07-06 05:23:13.109Z258.373° W2025-07-06 05:25:13.109Z337.61° N37.535°2025-07-06 05:28:13.109Z43.936° NE
4 mins2025-07-06 10:16:13.109Z342.23° N2025-07-06 10:18:13.109Z38.264° NE23.48°2025-07-06 10:20:13.109Z80.835° E
4 mins2025-07-06 11:53:13.109Z276.747° WNW2025-07-06 11:54:13.109Z245.792° WSW31.632°2025-07-06 11:57:13.109Z155.802° SSE
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