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: 12 hours ago
TLE from 12 hours ago
0 IRIDIUM 157
1 43251U 18030C 25307.69434667 -.00000079 00000-0 -35238-4 0 9992
2 43251 86.4003 24.6799 0002215 99.6857 260.4589 14.34216899397818Epoch: 2025-11-03T16:39Z
TLE epoch observation values (Epoch: 2025-11-03T16:39:51.552Z)
Latitude
-0.00002°
Longitude
91.52305°
Altitude
780.984 km
Speed
7.463 km/s
True Right ascension
01h 38m 43s
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
00:28:43
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.219 km
Perigee altitude
773.05 km
Semi-major axis
7,152.771 km
Eccentricity
0.00022
Inclination
86.4003°
RAAN
24.6799°
Arg. of periapsis
99.6857°
True anomaly
260.43387°
Mean anomaly
260.4589°
Eccentric anomaly
260.44639°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.000035238
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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 | 2025-11-04 06:11:28.598Z | 201.542° SSW | 2025-11-04 06:14:28.598Z | 258.338° W | 40.162° | 2025-11-04 06:19:28.598Z | 353.415° N |
| 7 mins | 2025-11-04 16:42:28.598Z | 30.961° NE | 2025-11-04 16:45:28.598Z | 88.028° E | 29.286° | 2025-11-04 16:49:28.598Z | 144.004° SSE |
| 6 mins | 2025-11-04 18:23:28.598Z | 313.945° NW | 2025-11-04 18:25:28.598Z | 282.206° WNW | 23.074° | 2025-11-04 18:29:28.598Z | 226.615° WSW |
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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