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 25308.92239210 -.00000019 00000-0 -13780-4 0 9994
2 42958 86.3940 119.0311 0002357 89.9004 270.2462 14.34217271422657Epoch: 2025-11-04T22:08Z
TLE epoch observation values (Epoch: 2025-11-04T22:08:14.677Z)
Latitude
-0.00001°
Longitude
102.56748°
Altitude
780.713 km
Speed
7.463 km/s
True Right ascension
07h 56m 07s
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
11:34:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.319 km
Perigee altitude
772.947 km
Semi-major axis
7,152.77 km
Eccentricity
0.00024
Inclination
86.394°
RAAN
119.0311°
Arg. of periapsis
89.9004°
True anomaly
270.21919°
Mean anomaly
270.2462°
Eccentric anomaly
270.2327°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.00001378
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2025-11-05 22:10:56.786Z | 48.663° ENE | 2025-11-05 22:12:56.786Z | 72.305° E | 12.962° | 2025-11-05 22:14:56.786Z | 96.322° ESE |
| 8 mins | 2025-11-05 23:50:56.786Z | 347.971° N | 2025-11-05 23:53:56.786Z | 294.935° NW | 42.286° | 2025-11-05 23:58:56.786Z | 189.641° SSW |
| 7 mins | 2025-11-06 11:06:56.786Z | 128.39° SE | 2025-11-06 11:09:56.786Z | 79.571° E | 25.1° | 2025-11-06 11:13:56.786Z | 26.992° NE |
| 7 mins | 2025-11-06 12:46:56.786Z | 225.57° WSW | 2025-11-06 12:49:56.786Z | 270.274° WNW | 26.98° | 2025-11-06 12:53:56.786Z | 334.889° NNW |
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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