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: 12 hours ago
TLE from 12 hours ago
0 IRIDIUM 129
1 42958U 17061D 25258.75882687 .00000029 00000-0 32995-5 0 9990
2 42958 86.4000 139.9984 0001711 89.3229 270.8162 14.34217645415467Epoch: 2025-09-15T18:12Z
TLE epoch observation values (Epoch: 2025-09-15T18:12:42.641Z)
Latitude
-0.00011°
Longitude
-128.13816°
Altitude
780.701 km
Speed
7.464 km/s
True Right ascension
09h 19m 59s
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
23:04:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.856 km
Perigee altitude
773.408 km
Semi-major axis
7,152.769 km
Eccentricity
0.00017
Inclination
86.4°
RAAN
139.9984°
Arg. of periapsis
89.3229°
True anomaly
270.7966°
Mean anomaly
270.8162°
Eccentric anomaly
270.8064°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000032995
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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 | 2025-09-16 16:06:06.704Z | 147.985° SSE | 2025-09-16 16:10:06.704Z | 81.209° E | 31.999° | 2025-09-16 16:14:06.704Z | 21.52° NNE |
| 6 mins | 2025-09-16 17:48:06.704Z | 242.98° WSW | 2025-09-16 17:51:06.704Z | 287.674° WNW | 20.919° | 2025-09-16 17:54:06.704Z | 327.677° NNW |
| 9 mins | 2025-09-17 04:17:06.704Z | 357.407° N | 2025-09-17 04:21:06.704Z | 208.229° SW | 44.988° | 2025-09-17 04:26:06.704Z | 179.439° S |
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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