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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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: 14 hours ago
TLE from 14 hours ago
0 IRIDIUM 157
1 43251U 18030C 25258.36800136 .00000249 00000-0 81878-4 0 9997
2 43251 86.3955 45.2872 0001900 91.3466 268.7947 14.34218999390746Epoch: 2025-09-15T08:49Z
TLE epoch observation values (Epoch: 2025-09-15T08:49:55.317Z)
Latitude
-0.00007°
Longitude
-81.76695°
Altitude
780.743 km
Speed
7.463 km/s
True Right ascension
03h 01m 08s
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
15:46:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.987 km
Perigee altitude
773.268 km
Semi-major axis
7,152.765 km
Eccentricity
0.00019
Inclination
86.3955°
RAAN
45.2872°
Arg. of periapsis
91.3466°
True anomaly
268.77293°
Mean anomaly
268.7947°
Eccentric anomaly
268.78382°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000081878
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-09-16 10:03:14.324Z | 164.533° S | 2025-09-16 10:08:14.324Z | 79.024° E | 39.539° | 2025-09-16 10:12:14.324Z | 13.882° NNE |
| 5 mins | 2025-09-16 11:47:14.324Z | 260.209° W | 2025-09-16 11:49:14.324Z | 286.272° WNW | 15.396° | 2025-09-16 11:52:14.324Z | 322.126° NNW |
| 9 mins | 2025-09-16 22:15:14.324Z | 347.938° N | 2025-09-16 22:19:14.324Z | 269.411° W | 41.558° | 2025-09-16 22:24:14.324Z | 191.521° 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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