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: 13 hours ago
TLE from 13 hours ago
0 IRIDIUM 129
1 42958U 17061D 26095.94799020 .00000356 00000-0 11997-3 0 9999
2 42958 86.3960 55.4417 0002046 79.3958 280.7468 14.34220117444441Epoch: 2026-04-05T22:45Z
TLE epoch observation values (Epoch: 2026-04-05T22:45:06.353Z)
Latitude
-0.00003°
Longitude
-120.08087°
Altitude
780.437 km
Speed
7.464 km/s
True Right ascension
03h 41m 46s
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
18:07:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.087 km
Perigee altitude
773.16 km
Semi-major axis
7,152.761 km
Eccentricity
0.0002
Inclination
86.396°
RAAN
55.4417°
Arg. of periapsis
79.3958°
True anomaly
280.72376°
Mean anomaly
280.7468°
Eccentric anomaly
280.73528°
Mean motion
3.58784 °/min
Orbital period
100.34 mins
BSTAR
0.00011997
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-04-06 20:39:21.182Z | 121.452° SE | 2026-04-06 20:42:21.182Z | 83.559° E | 18.404° | 2026-04-06 20:45:21.182Z | 43.2° NE |
| 8 mins | 2026-04-06 22:19:21.182Z | 210.947° SW | 2026-04-06 22:23:21.182Z | 292.382° WNW | 34.708° | 2026-04-06 22:27:21.182Z | 347.518° N |
| 7 mins | 2026-04-07 08:50:21.182Z | 22.204° NNE | 2026-04-07 08:53:21.182Z | 83.971° E | 34.915° | 2026-04-07 08:57:21.182Z | 151.297° SSE |
| 5 mins | 2026-04-07 10:31:21.182Z | 311.918° NW | 2026-04-07 10:33:21.182Z | 284.465° WNW | 18.64° | 2026-04-07 10:36:21.182Z | 243.162° WSW |
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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