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: 9 hours ago
TLE from 9 hours ago
0 IRIDIUM 173
1 43925U 19002D 26125.41859888 .00000074 00000-0 19196-4 0 9993
2 43925 86.4006 11.4401 0002235 87.5622 272.5830 14.34218061382822Epoch: 2026-05-05T10:02Z
TLE epoch observation values (Epoch: 2026-05-05T10:02:46.943Z)
Latitude
0.00002°
Longitude
-2.54922°
Altitude
780.645 km
Speed
7.464 km/s
True Right ascension
00h 45m 45s
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
02:36:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.229 km
Perigee altitude
773.032 km
Semi-major axis
7,152.768 km
Eccentricity
0.00022
Inclination
86.4006°
RAAN
11.4401°
Arg. of periapsis
87.5622°
True anomaly
272.55741°
Mean anomaly
272.583°
Eccentric anomaly
272.57021°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000019196
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-05-06 03:22:54.144Z | 36.502° NE | 2026-05-06 03:25:54.144Z | 75.605° E | 18.379° | 2026-05-06 03:28:54.144Z | 115.468° SE |
| 7 mins | 2026-05-06 05:03:54.144Z | 334.755° NNW | 2026-05-06 05:06:54.144Z | 273.624° WNW | 35.535° | 2026-05-06 05:10:54.144Z | 205.509° SW |
| 8 mins | 2026-05-06 16:18:54.144Z | 146.937° SSE | 2026-05-06 16:21:54.144Z | 99.2° ESE | 32.499° | 2026-05-06 16:26:54.144Z | 18.804° NNE |
| 6 mins | 2026-05-06 18:00:54.144Z | 248.234° W | 2026-05-06 18:02:54.144Z | 277.28° WNW | 20.2° | 2026-05-06 18:06:54.144Z | 330.304° NNW |
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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