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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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 139
1 42963U 17061J 26095.90993479 .00000339 00000-0 11387-3 0 9999
2 42963 86.3960 55.5210 0002310 88.9128 271.2332 14.34214956444481Epoch: 2026-04-05T21:50Z
TLE epoch observation values (Epoch: 2026-04-05T21:50:18.365Z)
Latitude
-0.00009°
Longitude
-106.26411°
Altitude
780.692 km
Speed
7.464 km/s
True Right ascension
03h 42m 05s
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
16:32:42
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.293 km
Perigee altitude
772.989 km
Semi-major axis
7,152.778 km
Eccentricity
0.00023
Inclination
86.396°
RAAN
55.521°
Arg. of periapsis
88.9128°
True anomaly
271.20674°
Mean anomaly
271.2332°
Eccentric anomaly
271.21997°
Mean motion
3.58782 °/min
Orbital period
100.34 mins
BSTAR
0.00011387
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-04-06 21:23:14.825Z | 162.171° S | 2026-04-06 21:28:14.825Z | 76.126° E | 38.157° | 2026-04-06 21:32:14.825Z | 14.999° NNE |
| 5 mins | 2026-04-06 23:07:14.825Z | 260.462° W | 2026-04-06 23:09:14.825Z | 287.639° WNW | 16.279° | 2026-04-06 23:12:14.825Z | 323.784° NNW |
| 9 mins | 2026-04-07 09:35:14.825Z | 349.34° N | 2026-04-07 09:39:14.825Z | 262.096° W | 42.519° | 2026-04-07 09:44:14.825Z | 189.283° 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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