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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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: 13 hours ago
TLE from 13 hours ago
0 IRIDIUM 128
1 42811U 17039J 25300.94977081 .00000152 00000-0 47105-4 0 9990
2 42811 86.3936 122.2652 0001637 84.6397 275.4985 14.34218125436696Epoch: 2025-10-27T22:47Z
TLE epoch observation values (Epoch: 2025-10-27T22:47:40.197Z)
Latitude
-0.00011°
Longitude
103.80343°
Altitude
780.605 km
Speed
7.464 km/s
True Right ascension
08h 09m 03s
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
07:21:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.801 km
Perigee altitude
773.46 km
Semi-major axis
7,152.767 km
Eccentricity
0.00016
Inclination
86.3936°
RAAN
122.2652°
Arg. of periapsis
84.6397°
True anomaly
275.47983°
Mean anomaly
275.4985°
Eccentric anomaly
275.48916°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000047105
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-10-28 12:18:24.899Z | 155.759° SSE | 2025-10-28 12:22:24.899Z | 91.903° ESE | 35.801° | 2025-10-28 12:27:24.899Z | 15.257° NNE |
| 5 mins | 2025-10-28 14:01:24.899Z | 254.027° W | 2025-10-28 14:03:24.899Z | 282.028° WNW | 18.144° | 2025-10-28 14:06:24.899Z | 321.781° NNW |
| 8 mins | 2025-10-29 00:30:24.899Z | 351.441° N | 2025-10-29 00:33:24.899Z | 302.005° NW | 43.699° | 2025-10-29 00:38:24.899Z | 185.71° SSW |
| 6 mins | 2025-10-29 11:46:24.899Z | 124.967° SE | 2025-10-29 11:49:24.899Z | 78.862° E | 23.043° | 2025-10-29 11:52:24.899Z | 36.173° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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