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: 7 hours ago
TLE from 7 hours ago
0 IRIDIUM 139
1 42963U 17061J 26141.74785549 .00000028 00000-0 28576-5 0 9995
2 42963 86.3992 36.3693 0002160 81.3277 278.8164 14.34217694451052Epoch: 2026-05-21T17:56Z
TLE epoch observation values (Epoch: 2026-05-21T17:56:54.714Z)
Latitude
0.00004°
Longitude
-112.24728°
Altitude
780.482 km
Speed
7.464 km/s
True Right ascension
02h 25m 28s
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
09:51:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.177 km
Perigee altitude
773.087 km
Semi-major axis
7,152.769 km
Eccentricity
0.00022
Inclination
86.3992°
RAAN
36.3693°
Arg. of periapsis
81.3277°
True anomaly
278.79194°
Mean anomaly
278.8164°
Eccentric anomaly
278.80417°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000028576
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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 | 2026-05-22 04:34:13.703Z | 14.76° NNE | 2026-05-22 04:38:13.703Z | 71.89° E | 33.009° | 2026-05-22 04:43:13.703Z | 151.838° SSE |
| 6 mins | 2026-05-22 06:16:13.703Z | 317.295° NNW | 2026-05-22 06:19:13.703Z | 274.819° WNW | 19.89° | 2026-05-22 06:22:13.703Z | 235.788° WSW |
| 8 mins | 2026-05-22 17:31:13.703Z | 180.765° SSW | 2026-05-22 17:34:13.703Z | 178.53° S | 44.439° | 2026-05-22 17:39:13.703Z | 2.615° NNE |
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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