IRIDIUM 128, 42811
Orbit data source: Space-Track
IRIDIUM 128, 42811 is a payload satellite owned by Iridium (US) in LEO that was launched on Sun, 25 Jun 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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42811 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: 12 hours ago
TLE from 12 hours ago
0 IRIDIUM 128
1 42811U 17039J 26086.44044866 .00000303 00000-0 10104-3 0 9999
2 42811 86.3940 59.3154 0002332 91.7112 268.4351 14.34218464458267Epoch: 2026-03-27T10:34Z
TLE epoch observation values (Epoch: 2026-03-27T10:34:14.764Z)
Latitude
0°
Longitude
75.87887°
Altitude
780.762 km
Speed
7.463 km/s
True Right ascension
03h 57m 15s
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
04:15:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.297 km
Perigee altitude
772.961 km
Semi-major axis
7,152.766 km
Eccentricity
0.00023
Inclination
86.394°
RAAN
59.3154°
Arg. of periapsis
91.7112°
True anomaly
268.40839°
Mean anomaly
268.4351°
Eccentric anomaly
268.42174°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.00010104
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Other satellites on launch #39 in the year 2017 (2017-06-25 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 128 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-03-28 00:07:22.201Z | 255.871° W | 2026-03-28 00:09:22.201Z | 280.043° WNW | 14.5° | 2026-03-28 00:12:22.201Z | 316.946° NNW |
| 4 mins | 2026-03-28 08:57:22.201Z | 57.608° ENE | 2026-03-28 08:58:22.201Z | 70.571° E | 14.667° | 2026-03-28 09:01:22.201Z | 107.294° ESE |
| 8 mins | 2026-03-28 10:36:22.201Z | 344.403° N | 2026-03-28 10:39:22.201Z | 294.067° NW | 39.888° | 2026-03-28 10:44:22.201Z | 194.478° SSW |
| 7 mins | 2026-03-28 21:52:22.201Z | 133.393° SE | 2026-03-28 21:55:22.201Z | 81.772° E | 27.723° | 2026-03-28 21:59:22.201Z | 25.436° NE |
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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