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: 6 hours ago
TLE from 6 hours ago
0 IRIDIUM 129
1 42958U 17061D 26038.17966086 .00000254 00000-0 83465-4 0 9996
2 42958 86.3918 79.6204 0002446 99.9895 260.1577 14.34217252436167Epoch: 2026-02-07T04:18Z
TLE epoch observation values (Epoch: 2026-02-07T04:18:42.698Z)
Latitude
-0.00001°
Longitude
-122.3644°
Altitude
781.019 km
Speed
7.463 km/s
True Right ascension
05h 18m 28s
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
12:36:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.383 km
Perigee altitude
772.884 km
Semi-major axis
7,152.77 km
Eccentricity
0.00024
Inclination
86.3918°
RAAN
79.6204°
Arg. of periapsis
99.9895°
True anomaly
260.13008°
Mean anomaly
260.1577°
Eccentric anomaly
260.14389°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000083465
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-02-07 14:56:59.377Z | 354.049° N | 2026-02-07 15:00:59.377Z | 211.861° SW | 43.692° | 2026-02-07 15:04:59.377Z | 183.48° SSW |
| 6 mins | 2026-02-08 02:13:59.377Z | 115.013° SE | 2026-02-08 02:15:59.377Z | 83.707° E | 21.849° | 2026-02-08 02:19:59.377Z | 31.348° NE |
| 8 mins | 2026-02-08 03:52:59.377Z | 218.239° SW | 2026-02-08 03:56:59.377Z | 289.494° WNW | 30.562° | 2026-02-08 04:00:59.377Z | 343.633° N |
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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