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, 4.8 m
Radar Cross Section
10.154 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 25353.11365262 .00000237 00000-0 77567-4 0 9999
2 43251 86.3965 5.6986 0002172 87.6811 272.4634 14.34217916404320Epoch: 2025-12-19T02:43Z
TLE epoch observation values (Epoch: 2025-12-19T02:43:39.586Z)
Latitude
0.00004°
Longitude
-123.1758°
Altitude
780.651 km
Speed
7.464 km/s
True Right ascension
00h 22m 47s
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
15:20:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.185 km
Perigee altitude
773.078 km
Semi-major axis
7,152.768 km
Eccentricity
0.00022
Inclination
86.3965°
RAAN
5.6986°
Arg. of periapsis
87.6811°
True anomaly
272.43853°
Mean anomaly
272.4634°
Eccentric anomaly
272.45097°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000077567
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-12-20 00:37:40.996Z | 129.998° SE | 2025-12-20 00:40:40.996Z | 88.607° E | 23.023° | 2025-12-20 00:44:40.996Z | 32.094° NE |
| 7 mins | 2025-12-20 02:18:40.996Z | 227.133° WSW | 2025-12-20 02:21:40.996Z | 282.397° WNW | 29.366° | 2025-12-20 02:25:40.996Z | 340.738° N |
| 8 mins | 2025-12-20 12:48:40.996Z | 12.086° NNE | 2025-12-20 12:51:40.996Z | 70.554° E | 40.258° | 2025-12-20 12:56:40.996Z | 163.871° S |
| 4 mins | 2025-12-20 14:30:40.996Z | 299.912° NW | 2025-12-20 14:31:40.996Z | 287.176° WNW | 14.466° | 2025-12-20 14:34:40.996Z | 250.462° W |
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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