IRIDIUM 129, 42958
Orbit data source: Space-Track
IRIDIUM 129, 42958 is a payload satellite owned by Iridium (US) in LEO that was launched on Mon, 09 Oct 2017 UTC via an FALCON 9 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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42958 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
OATK SSG Gilbert
Mission
Operational Commercial Communications
Bus & Motor
ELITEBUS, Unknown motor
Mass
860 kg wet, 700 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Trap Box + 2 Pan, 4.8 m
Radar Cross Section
10.154 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 17 hours ago
TLE from 17 hours ago
0 IRIDIUM 129
1 42958U 17061D 25356.36498731 .00000111 00000-0 32504-4 0 9996
2 42958 86.3976 99.1981 0001692 93.5168 266.6221 14.34216455429450Epoch: 2025-12-22T08:45Z
TLE epoch observation values (Epoch: 2025-12-22T08:45:34.903Z)
Latitude
-0.00007°
Longitude
-123.36147°
Altitude
780.794 km
Speed
7.463 km/s
True Right ascension
06h 36m 47s
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
01:17:44
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.846 km
Perigee altitude
773.426 km
Semi-major axis
7,152.773 km
Eccentricity
0.00017
Inclination
86.3976°
RAAN
99.1981°
Arg. of periapsis
93.5168°
True anomaly
266.60275°
Mean anomaly
266.6221°
Eccentric anomaly
266.61242°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000032504
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Other satellites on launch #61 in the year 2017 (2017-10-09 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 129 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-12-23 06:39:41.307Z | 129.724° SE | 2025-12-23 06:42:41.307Z | 87.188° E | 23.398° | 2025-12-23 06:46:41.307Z | 31.205° NE |
| 7 mins | 2025-12-23 08:20:41.307Z | 228.508° WSW | 2025-12-23 08:23:41.307Z | 284.268° WNW | 28.98° | 2025-12-23 08:27:41.307Z | 340.914° N |
| 8 mins | 2025-12-23 18:50:41.307Z | 11.971° NNE | 2025-12-23 18:53:41.307Z | 74.167° E | 40.682° | 2025-12-23 18:58:41.307Z | 164.637° S |
| 4 mins | 2025-12-23 20:32:41.307Z | 298.854° NW | 2025-12-23 20:33:41.307Z | 286.127° WNW | 14.283° | 2025-12-23 20:36:41.307Z | 249.968° W |
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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