IRIDIUM 173, 43925
Orbit data source: Space-Track
IRIDIUM 173, 43925 is a payload satellite owned by Iridium (US) in LEO that was launched on Fri, 11 Jan 2019 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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43925 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
NGIS 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 173
1 43925U 19002D 26252.60660557 .00000152 00000-0 47187-4 0 9996
2 43925 86.3989 318.2942 0002277 94.4294 265.7162 14.34217389401058Epoch: 2026-09-09T14:33Z
TLE epoch observation values (Epoch: 2026-09-09T14:33:30.721Z)
Latitude
-0.00001°
Longitude
111.25995°
Altitude
780.841 km
Speed
7.463 km/s
True Right ascension
21h 13m 10s
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
18:51:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.261 km
Perigee altitude
773.004 km
Semi-major axis
7,152.77 km
Eccentricity
0.00023
Inclination
86.3989°
RAAN
318.2942°
Arg. of periapsis
94.4294°
True anomaly
265.69018°
Mean anomaly
265.7162°
Eccentric anomaly
265.70319°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000047187
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Other satellites on launch #2 in the year 2019 (2019-01-11 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 173 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 | 2026-09-10 04:05:18.699Z | 127.641° SE | 2026-09-10 04:08:18.699Z | 85.964° E | 24.324° | 2026-09-10 04:12:18.699Z | 31.844° NE |
| 8 mins | 2026-09-10 05:45:18.699Z | 218.268° SW | 2026-09-10 05:49:18.699Z | 286.039° WNW | 35.689° | 2026-09-10 05:53:18.699Z | 342.364° N |
| 8 mins | 2026-09-10 16:16:18.699Z | 14.064° NNE | 2026-09-10 16:19:18.699Z | 76.13° E | 55.808° | 2026-09-10 16:24:18.699Z | 162.578° S |
| 4 mins | 2026-09-10 17:58:18.699Z | 299.191° NW | 2026-09-10 17:59:18.699Z | 286.108° WNW | 15.807° | 2026-09-10 18:02:18.699Z | 248.895° 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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