IRIDIUM 139, 42963
Orbit data source: Space-Track
IRIDIUM 139, 42963 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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42963 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: 13 hours ago
TLE from 13 hours ago
0 IRIDIUM 139
1 42963U 17061J 25258.72077231 .00000113 00000-0 33357-4 0 9990
2 42963 86.4002 140.0727 0002328 87.3453 272.8009 14.34218035415506Epoch: 2025-09-15T17:17Z
TLE epoch observation values (Epoch: 2025-09-15T17:17:54.727Z)
Latitude
-0.00006°
Longitude
-114.3267°
Altitude
780.636 km
Speed
7.464 km/s
True Right ascension
09h 20m 17s
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
23:10:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.296 km
Perigee altitude
772.965 km
Semi-major axis
7,152.768 km
Eccentricity
0.00023
Inclination
86.4002°
RAAN
140.0727°
Arg. of periapsis
87.3453°
True anomaly
272.77425°
Mean anomaly
272.8009°
Eccentric anomaly
272.78758°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000033357
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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 139 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 16:52:18.159Z | 189.73° SSW | 2025-09-16 16:55:18.159Z | 238.76° WSW | 43.781° | 2025-09-16 17:00:18.159Z | 358.702° N |
| 6 mins | 2025-09-17 03:23:18.159Z | 36.569° NE | 2025-09-17 03:26:18.159Z | 86.332° E | 24.223° | 2025-09-17 03:29:18.159Z | 129.199° SE |
| 7 mins | 2025-09-17 05:03:18.159Z | 329.436° NNW | 2025-09-17 05:06:18.159Z | 283.643° WNW | 27.901° | 2025-09-17 05:10:18.159Z | 219.569° SW |
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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