IRIDIUM 155, 43573
Orbit data source: Space-Track
IRIDIUM 155, 43573 is a payload satellite owned by Iridium (US) in LEO that was launched on Wed, 25 Jul 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
43573 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
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: 11 hours ago
TLE from 11 hours ago
0 IRIDIUM 155
1 43573U 18061E 25351.29433527 -.00000008 00000-0 -97635-5 0 9994
2 43573 86.3976 132.7334 0001990 99.7384 260.4037 14.34217078387282Epoch: 2025-12-17T07:03Z
TLE epoch observation values (Epoch: 2025-12-17T07:03:50.567Z)
Latitude
0.00002°
Longitude
-59.39355°
Altitude
780.958 km
Speed
7.463 km/s
True Right ascension
08h 50m 56s
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
16:45:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.057 km
Perigee altitude
773.21 km
Semi-major axis
7,152.771 km
Eccentricity
0.0002
Inclination
86.3976°
RAAN
132.7334°
Arg. of periapsis
99.7384°
True anomaly
260.38122°
Mean anomaly
260.4037°
Eccentric anomaly
260.39246°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.0000097635
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 #61 in the year 2018 (2018-07-25 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 155 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-12-17 21:02:20.668Z | 20.572° NNE | 2025-12-17 21:06:20.668Z | 80.282° E | 28.746° | 2025-12-17 21:10:20.668Z | 141.019° SSE |
| 6 mins | 2025-12-17 22:44:20.668Z | 318.213° NNW | 2025-12-17 22:47:20.668Z | 269.217° W | 23.516° | 2025-12-17 22:50:20.668Z | 228.264° WSW |
| 9 mins | 2025-12-18 09:58:20.668Z | 172.092° S | 2025-12-18 10:02:20.668Z | 99.501° ESE | 43.646° | 2025-12-18 10:07:20.668Z | 6.947° NNE |
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 |
|---|