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, 4.7 m
Radar Cross Section
14.423 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 IRIDIUM 129
1 42958U 17061D 25261.13095541 .00000130 00000-0 39516-4 0 9999
2 42958 86.3994 139.0079 0001745 91.7653 268.3742 14.34218566415806Epoch: 2025-09-18T03:08Z
TLE epoch observation values (Epoch: 2025-09-18T03:08:34.547Z)
Latitude
-0.00009°
Longitude
94.56699°
Altitude
780.751 km
Speed
7.463 km/s
True Right ascension
09h 16m 01s
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
11:21:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.877 km
Perigee altitude
773.381 km
Semi-major axis
7,152.766 km
Eccentricity
0.00017
Inclination
86.3994°
RAAN
139.0079°
Arg. of periapsis
91.7653°
True anomaly
268.35421°
Mean anomaly
268.3742°
Eccentric anomaly
268.36421°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000039516
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-19 03:10:14.267Z | 27.886° NE | 2025-09-19 03:14:14.267Z | 87.568° E | 23.856° | 2025-09-19 03:17:14.267Z | 129.372° SE |
| 7 mins | 2025-09-19 04:51:14.267Z | 329.206° NNW | 2025-09-19 04:54:14.267Z | 282.151° WNW | 28.296° | 2025-09-19 04:58:14.267Z | 218.588° SW |
| 8 mins | 2025-09-19 16:06:14.267Z | 161.516° S | 2025-09-19 16:10:14.267Z | 74.895° E | 39.703° | 2025-09-19 16:14:14.267Z | 13.276° NNE |
| 4 mins | 2025-09-19 17:49:14.267Z | 261.302° W | 2025-09-19 17:51:14.267Z | 287.316° WNW | 15.17° | 2025-09-19 17:53:14.267Z | 312.572° NW |
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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