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: 15 hours ago
TLE from 15 hours ago
0 IRIDIUM 157
1 43251U 18030C 26305.21156706 .00000054 00000-0 12394-4 0 9993
2 43251 86.3984 233.1075 0002090 83.9055 276.2378 14.34217892449774Epoch: 2026-11-01T05:04Z
TLE epoch observation values (Epoch: 2026-11-01T05:04:39.393Z)
Latitude
-0.00015°
Longitude
116.43716°
Altitude
780.555 km
Speed
7.464 km/s
True Right ascension
15h 32m 25s
True Declination
0° 00' 01"
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
15:26:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.126 km
Perigee altitude
773.136 km
Semi-major axis
7,152.768 km
Eccentricity
0.00021
Inclination
86.3984°
RAAN
233.1075°
Arg. of periapsis
83.9055°
True anomaly
276.21399°
Mean anomaly
276.2378°
Eccentric anomaly
276.2259°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000012394
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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 | 2026-11-01 20:15:21.691Z | 197.283° SSW | 2026-11-01 20:20:21.691Z | 291.769° WNW | 55.972° | 2026-11-01 20:24:21.691Z | 351.692° N |
| 7 mins | 2026-11-02 06:47:21.691Z | 26.393° NE | 2026-11-02 06:50:21.691Z | 77.971° E | 35.315° | 2026-11-02 06:54:21.691Z | 142.239° SSE |
| 6 mins | 2026-11-02 08:28:21.691Z | 318.041° NNW | 2026-11-02 08:31:21.691Z | 271.199° WNW | 24.599° | 2026-11-02 08:34:21.691Z | 230.577° 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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