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, 4.7 m
Radar Cross Section
14.423 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 IRIDIUM 128
1 42811U 17039J 25261.11192970 .00000014 00000-0 -19120-5 0 9996
2 42811 86.3997 138.9162 0002268 77.5575 282.5874 14.34217756430984Epoch: 2025-09-18T02:41Z
TLE epoch observation values (Epoch: 2025-09-18T02:41:10.726Z)
Latitude
-0.00005°
Longitude
101.3433°
Altitude
780.365 km
Speed
7.464 km/s
True Right ascension
09h 15m 39s
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
04:20:06
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.254 km
Perigee altitude
773.009 km
Semi-major axis
7,152.769 km
Eccentricity
0.00023
Inclination
86.3997°
RAAN
138.9162°
Arg. of periapsis
77.5575°
True anomaly
282.56203°
Mean anomaly
282.5874°
Eccentric anomaly
282.57472°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.000001912
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-09-18 16:11:01.625Z | 166.167° S | 2025-09-18 16:16:01.625Z | 89.221° E | 40.314° | 2025-09-18 16:21:01.625Z | 10.964° NNE |
| 4 mins | 2025-09-18 17:56:01.625Z | 270.277° WNW | 2025-09-18 17:57:01.625Z | 283.483° WNW | 14.892° | 2025-09-18 18:00:01.625Z | 319.768° NNW |
| 8 mins | 2025-09-19 04:24:01.625Z | 343.891° N | 2025-09-19 04:27:01.625Z | 281.408° WNW | 40.857° | 2025-09-19 04:32:01.625Z | 193.08° SSW |
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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