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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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: 6 hours ago
TLE from 6 hours ago
0 IRIDIUM 129
1 42958U 17061D 26141.78591113 .00000017 00000-0 -83890-6 0 9995
2 42958 86.3990 36.2889 0002265 91.0244 269.1212 14.34217712451012Epoch: 2026-05-21T18:51Z
TLE epoch observation values (Epoch: 2026-05-21T18:51:42.721Z)
Latitude
0.00004°
Longitude
-126.06522°
Altitude
780.743 km
Speed
7.463 km/s
True Right ascension
02h 25m 09s
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
09:49:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.252 km
Perigee altitude
773.012 km
Semi-major axis
7,152.769 km
Eccentricity
0.00023
Inclination
86.399°
RAAN
36.2889°
Arg. of periapsis
91.0244°
True anomaly
269.09525°
Mean anomaly
269.1212°
Eccentric anomaly
269.10822°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-8.389e-7
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-05-22 03:50:22.271Z | 48.733° ENE | 2026-05-22 03:52:22.271Z | 74.121° E | 15.003° | 2026-05-22 03:55:22.271Z | 110.198° ESE |
| 8 mins | 2026-05-22 05:30:22.271Z | 342.485° N | 2026-05-22 05:33:22.271Z | 280.125° WNW | 40.096° | 2026-05-22 05:38:22.271Z | 194.478° SSW |
| 7 mins | 2026-05-22 16:46:22.271Z | 131.281° SE | 2026-05-22 16:49:22.271Z | 75.588° E | 27.921° | 2026-05-22 16:53:22.271Z | 23.5° NE |
| 7 mins | 2026-05-22 18:26:22.271Z | 231.177° WSW | 2026-05-22 18:29:22.271Z | 274.317° WNW | 24.186° | 2026-05-22 18:33:22.271Z | 333.177° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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