IRIDIUM 51, 25262
Orbit data source: Space-Track
IRIDIUM 51, 25262 is a payload satellite owned by Iridium (US) in LEO that was launched on Wed, 25 Mar 1998 UTC via a CHANG ZHENG 2C-III/SD launch vehicle from the Taiyaun Space Center, China (TSC). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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25262 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Motorola
Mission
Non-operational Commercial Communications
Bus & Motor
LM700, Unknown motor
Mass
667 kg wet, 556 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 4.0 m
Radar Cross Section
5.666 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 IRIDIUM 51
1 25262U 98018A 26071.59137701 .02721188 -14189-5 12290-2 0 9996
2 25262 86.3424 278.8642 0013857 268.7285 91.2426 16.21909946488826Epoch: 2026-03-12T14:11Z
TLE epoch observation values (Epoch: 2026-03-12T14:11:34.973Z)
Latitude
0.00001°
Longitude
-104.27058°
Altitude
217.893 km
Speed
7.776 km/s
True Right ascension
18h 35m 27s
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
05:00:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
220.208 km
Perigee altitude
201.946 km
Semi-major axis
6,589.214 km
Eccentricity
0.00139
Inclination
86.3424°
RAAN
278.8642°
Arg. of periapsis
268.7285°
True anomaly
91.40135°
Mean anomaly
91.2426°
Eccentric anomaly
91.32197°
Mean motion
4.05782 °/min
Orbital period
88.72 mins
BSTAR
0.001229
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Other satellites on launch #18 in the year 1998 (1998-03-25 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.IRIDIUM 51 Visibility
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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. |
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| IRIDIUM 51 is likely not visible in the next few days. |
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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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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