IRIDIUM 157, 43251
Orbit data source: Space-Track
IRIDIUM 157, 43251 is a payload satellite owned by Iridium (US) in LEO that was launched on Fri, 30 Mar 2018 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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43251 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: 2 days ago
TLE from 2 days ago
0 IRIDIUM 157
1 43251U 18030C 26171.39554921 .00000069 00000-0 17534-4 0 9991
2 43251 86.3962 289.0785 0002210 94.1526 265.9923 14.34217878430594Epoch: 2026-06-20T09:29Z
TLE epoch observation values (Epoch: 2026-06-20T09:29:35.451Z)
Latitude
0.00002°
Longitude
-121.92999°
Altitude
780.829 km
Speed
7.463 km/s
True Right ascension
19h 16m 18s
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
23:20:30
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.212 km
Perigee altitude
773.05 km
Semi-major axis
7,152.768 km
Eccentricity
0.00022
Inclination
86.3962°
RAAN
289.0785°
Arg. of periapsis
94.1526°
True anomaly
265.96704°
Mean anomaly
265.9923°
Eccentric anomaly
265.97967°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000017534
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Other satellites on launch #30 in the year 2018 (2018-03-30 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 157 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 | 2026-06-22 19:00:11.360Z | 23.533° NE | 2026-06-22 19:04:11.360Z | 79.865° E | 25.419° | 2026-06-22 19:08:11.360Z | 136.01° SSE |
| 7 mins | 2026-06-22 20:42:11.360Z | 321.904° NNW | 2026-06-22 20:45:11.360Z | 268.515° W | 26.802° | 2026-06-22 20:49:11.360Z | 216.764° SW |
| 8 mins | 2026-06-23 07:57:11.360Z | 161.812° S | 2026-06-23 08:00:11.360Z | 96.526° ESE | 41.164° | 2026-06-23 08:05:11.360Z | 10.268° NNE |
| 4 mins | 2026-06-23 09:40:11.360Z | 269.199° W | 2026-06-23 09:41:11.360Z | 281.956° WNW | 14.163° | 2026-06-23 09:44:11.360Z | 318.013° 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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