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: 12 hours ago
TLE from 12 hours ago
0 IRIDIUM 139
1 42963U 17061J 26275.91271669 .00000007 00000-0 -47393-5 0 9991
2 42963 86.4009 340.3141 0002068 95.0611 265.0820 14.34217544470286Epoch: 2026-10-02T21:54Z
TLE epoch observation values (Epoch: 2026-10-02T21:54:18.722Z)
Latitude
-0.00008°
Longitude
0.10823°
Altitude
780.846 km
Speed
7.463 km/s
True Right ascension
22h 41m 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
03:26:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.111 km
Perigee altitude
773.153 km
Semi-major axis
7,152.769 km
Eccentricity
0.00021
Inclination
86.4009°
RAAN
340.3141°
Arg. of periapsis
95.0611°
True anomaly
265.05839°
Mean anomaly
265.082°
Eccentric anomaly
265.0702°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.0000047393
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-10-03 15:15:13.544Z | 47.733° ENE | 2026-10-03 15:17:13.544Z | 72.746° E | 15.495° | 2026-10-03 15:20:13.544Z | 109.034° ESE |
| 8 mins | 2026-10-03 16:55:13.544Z | 343.308° N | 2026-10-03 16:58:13.544Z | 285.655° WNW | 57.511° | 2026-10-03 17:03:13.544Z | 194.446° SSW |
| 7 mins | 2026-10-04 04:11:13.544Z | 131.574° SE | 2026-10-04 04:14:13.544Z | 76.927° E | 31.987° | 2026-10-04 04:18:13.544Z | 23.99° NE |
| 7 mins | 2026-10-04 05:51:13.544Z | 230.479° WSW | 2026-10-04 05:54:13.544Z | 273.194° WNW | 26.96° | 2026-10-04 05:58:13.544Z | 332.83° NNW |
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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