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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25544 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Khrunichev
Mission
Operational Civil Spaceship
Bus & Motor
77KS, Unknown motor
Mass
20,351 kg wet, ~19,000 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Irr, 66.1 m
Radar Cross Section
5762.400 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 ISS (ZARYA)
1 25544U 98067A 26251.46617103 .00001902 00000-0 42648-4 0 9994
2 25544 51.6295 247.9233 0004930 112.8116 247.3394 15.49040812584661Epoch: 2026-09-08T11:11Z
TLE epoch observation values (Epoch: 2026-09-08T11:11:17.176Z)
Latitude
-0.00001°
Longitude
92.56954°
Altitude
421.563 km
Speed
7.659 km/s
True Right ascension
16h 31m 41s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
10:13:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
423.392 km
Perigee altitude
416.689 km
Semi-major axis
6,798.177 km
Eccentricity
0.00049
Inclination
51.6295°
RAAN
247.9233°
Arg. of periapsis
112.8116°
True anomaly
247.28728°
Mean anomaly
247.3394°
Eccentric anomaly
247.31334°
Mean motion
3.87217 °/min
Orbital period
92.97 mins
BSTAR
0.000042648
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Other satellites on launch #67 in the year 1998 (1998-11-20 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.ISS (ZARYA) Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-09-09 02:51:51.082Z | 234.297° WSW | 2026-09-09 02:54:51.082Z | 37.471° NE | 68.731° | 2026-09-09 02:57:51.082Z | 51.57° ENE |
| 4 mins | 2026-09-09 07:45:51.082Z | 346.001° N | 2026-09-09 07:47:51.082Z | 32.91° NE | 19.477° | 2026-09-09 07:49:51.082Z | 70.174° E |
| 5 mins | 2026-09-09 09:22:51.082Z | 299.484° NW | 2026-09-09 09:24:51.082Z | 170.867° S | 65.276° | 2026-09-09 09:27:51.082Z | 134.79° SE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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