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: 7 hours ago
TLE from 7 hours ago
0 IRIDIUM 129
1 42958U 17061D 26276.16007847 .00000023 00000-0 10306-5 0 9999
2 42958 86.4007 340.1433 0002410 93.9915 266.1557 14.34217744470275Epoch: 2026-10-03T03:50Z
TLE epoch observation values (Epoch: 2026-10-03T03:50:30.779Z)
Latitude
0.00002°
Longitude
-89.35661°
Altitude
780.834 km
Speed
7.463 km/s
True Right ascension
22h 40m 34s
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
04:52:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.355 km
Perigee altitude
772.908 km
Semi-major axis
7,152.769 km
Eccentricity
0.00024
Inclination
86.4007°
RAAN
340.1433°
Arg. of periapsis
93.9915°
True anomaly
266.12815°
Mean anomaly
266.1557°
Eccentric anomaly
266.14192°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000010306
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-10-03 16:07:44.079Z | 8.352° NNE | 2026-10-03 16:12:44.079Z | 84.253° E | 50.733° | 2026-10-03 16:17:44.079Z | 159.894° S |
| 5 mins | 2026-10-03 17:50:44.079Z | 310.083° NW | 2026-10-03 17:52:44.079Z | 284.055° WNW | 17.479° | 2026-10-03 17:55:44.079Z | 245.616° WSW |
| 9 mins | 2026-10-04 05:04:44.079Z | 189.384° SSW | 2026-10-04 05:08:44.079Z | 284.148° WNW | 74.283° | 2026-10-04 05:13:44.079Z | 358.747° N |
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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