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: 2 days ago
TLE from 2 days ago
0 IRIDIUM 129
1 42958U 17061D 25306.48049367 .00000068 00000-0 17152-4 0 9994
2 42958 86.3933 120.0521 0002513 91.2942 268.8541 14.34217833422302Epoch: 2025-11-02T11:31Z
TLE epoch observation values (Epoch: 2025-11-02T11:31:54.653Z)
Latitude
-0.00007°
Longitude
-94.92124°
Altitude
780.754 km
Speed
7.463 km/s
True Right ascension
08h 00m 12s
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
22:44:44
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.429 km
Perigee altitude
772.834 km
Semi-major axis
7,152.768 km
Eccentricity
0.00025
Inclination
86.3933°
RAAN
120.0521°
Arg. of periapsis
91.2942°
True anomaly
268.82531°
Mean anomaly
268.8541°
Eccentric anomaly
268.8397°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000017152
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-11-04 12:11:46.347Z | 183.457° SSW | 2025-11-04 12:16:46.347Z | 320.284° NNW | 44.687° | 2025-11-04 12:20:46.347Z | 0.584° NNE |
| 7 mins | 2025-11-04 22:43:46.347Z | 33.15° NE | 2025-11-04 22:46:46.347Z | 76.326° E | 22.453° | 2025-11-04 22:50:46.347Z | 130.391° SE |
| 7 mins | 2025-11-05 00:24:46.347Z | 327.61° NNW | 2025-11-05 00:27:46.347Z | 272.192° WNW | 30.258° | 2025-11-05 00:31:46.347Z | 213.207° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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