IRIDIUM 39, 25042
Orbit data source: Space-Track
IRIDIUM 39, 25042 is a payload satellite owned by Iridium (US) in LEO that was launched on Sun, 09 Nov 1997 UTC via a DELTA 7920-10C launch vehicle from the Air Force Western Test Range (AFWTR). 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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25042 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
MOTO/LMMS
Mission
Non-operational Commercial Communications
Bus & Motor
LM700, Unknown motor
Mass
662 kg wet, 556 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 4.2 m
Radar Cross Section
5.666 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 IRIDIUM 39
1 25042U 97069D 25259.19885028 .00000596 00000-0 15049-3 0 9990
2 25042 86.3986 172.1489 0018275 10.0377 350.1189 14.49327021462145Epoch: 2025-09-16T04:46Z
TLE epoch observation values (Epoch: 2025-09-16T04:46:20.664Z)
Latitude
0.00005°
Longitude
105.17022°
Altitude
718.124 km
Speed
7.503 km/s
True Right ascension
11h 28m 35s
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
12:00:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
737.771 km
Perigee altitude
711.81 km
Semi-major axis
7,102.927 km
Eccentricity
0.00183
Inclination
86.3986°
RAAN
172.1489°
Arg. of periapsis
10.0377°
True anomaly
350.08288°
Mean anomaly
350.1189°
Eccentric anomaly
350.1009°
Mean motion
3.62566 °/min
Orbital period
99.29 mins
BSTAR
0.00015049
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Other satellites on launch #69 in the year 1997 (1997-11-09 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 39 Visibility forecast
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-16 19:48:50.149Z | 229.294° WSW | 2025-09-16 19:52:50.149Z | 288.779° WNW | 22.184° | 2025-09-16 19:55:50.149Z | 330.941° NNW |
| 8 mins | 2025-09-17 06:12:50.149Z | 7.333° NNE | 2025-09-17 06:15:50.149Z | 59.602° ENE | 42.01° | 2025-09-17 06:20:50.149Z | 168.515° S |
| 8 mins | 2025-09-17 19:00:50.149Z | 195.83° SSW | 2025-09-17 19:03:50.149Z | 259.724° W | 42.221° | 2025-09-17 19:08:50.149Z | 356.541° N |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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