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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
43251 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
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: 10 hours ago
TLE from 10 hours ago
0 IRIDIUM 157
1 43251U 18030C 26256.02475988 -.00000036 00000-0 -19844-4 0 9992
2 43251 86.3910 253.6782 0002175 88.9302 271.2143 14.34216592442728Epoch: 2026-09-13T00:35Z
TLE epoch observation values (Epoch: 2026-09-13T00:35:39.253Z)
Latitude
-0.00003°
Longitude
-107.2607°
Altitude
780.689 km
Speed
7.464 km/s
True Right ascension
16h 54m 42s
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
03:33:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.191 km
Perigee altitude
773.08 km
Semi-major axis
7,152.773 km
Eccentricity
0.00022
Inclination
86.391°
RAAN
253.6782°
Arg. of periapsis
88.9302°
True anomaly
271.18938°
Mean anomaly
271.2143°
Eccentric anomaly
271.20184°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.000019844
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #30 in the year 2018 (2018-03-30 UTC)
Did you know?
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
Loading observer location...
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 | 2026-09-13 11:13:40.714Z | 28.352° NE | 2026-09-13 11:16:40.714Z | 69.586° E | 26.517° | 2026-09-13 11:20:40.714Z | 130.239° SE |
| 7 mins | 2026-09-13 12:54:40.714Z | 328.327° NNW | 2026-09-13 12:57:40.714Z | 280.398° WNW | 32.477° | 2026-09-13 13:01:40.714Z | 218.415° SW |
| 8 mins | 2026-09-14 00:09:40.714Z | 161.402° S | 2026-09-14 00:13:40.714Z | 69.026° E | 55.989° | 2026-09-14 00:17:40.714Z | 12.724° NNE |
| 4 mins | 2026-09-14 01:52:40.714Z | 262.797° W | 2026-09-14 01:54:40.714Z | 288.862° WNW | 15.649° | 2026-09-14 01:56:40.714Z | 313.69° NW |
| 4 mins | 2026-09-14 10:41:40.714Z | 53.221° ENE | 2026-09-14 10:43:40.714Z | 78.675° E | 14.788° | 2026-09-14 10:45:40.714Z | 102.801° ESE |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|