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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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Iframe URL

https://www.satcat.com/sats-embedded/43925?theme=dark&initialShowStats=false

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Identifier

43925, 2019-002D

Orbit

LEO

Country

Related business

Iridium Communications Inc. (US)

Manufacturer

NGIS SSG Gilbert

Mission

Operational Commercial Communications

Bus & Motor

ELITEBUS, Unknown motor

Mass

860 kg wet, 700 kg dry

Launch date (UTC)

2019-01-11 (7 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Trap Box + 2 Pan, 4.8 m

Radar Cross Section

10.154 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 IRIDIUM 173
1 43925U 19002D   25348.78850373  .00000309  00000-0  10311-3 0  9999
2 43925  86.3966  70.6535 0001990 101.4832 258.6587 14.34218224362527

Epoch: 2025-12-14T18:55Z

TLE epoch observation values (Epoch: 2025-12-14T18:55:26.722Z)

Latitude

-0.00005°

Longitude

63.09576°

Altitude

780.997 km

Speed

7.463 km/s

True Right ascension

04h 42m 36s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

17:45:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.053 km

Perigee altitude

773.207 km

Semi-major axis

7,152.767 km

Eccentricity

0.0002

Inclination

86.3966°

RAAN

70.6535°

Arg. of periapsis

101.4832°

True anomaly

258.63634°

Mean anomaly

258.6587°

Eccentric anomaly

258.64752°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.00010311

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Other satellites on launch #2 in the year 2019 (2019-01-11 UTC)

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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.
9 mins	2025-12-16 06:12:23.402Z	184.964° SSW	2025-12-16 06:16:23.402Z	273.841° WNW	44.752°	2025-12-16 06:21:23.402Z	0.67° NNE
6 mins	2025-12-16 16:44:23.402Z	41.529° NE	2025-12-16 16:46:23.402Z	72.821° E	22.768°	2025-12-16 16:50:23.402Z	129.512° SE
7 mins	2025-12-16 18:24:23.402Z	328.775° NNW	2025-12-16 18:27:23.402Z	277.013° WNW	29.777°	2025-12-16 18:31:23.402Z	215.079° SW

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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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Check out IRIDIUM 173, 43925 on other resources

View IRIDIUM 173, 43925 on NASA - NSSDCA Website

View IRIDIUM 173, 43925 on Heavens-Above

View IRIDIUM 173, 43925 on Keep Track

View IRIDIUM 173, 43925 on Celestrak

View IRIDIUM 173, 43925 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

IRIDIUM 173, 43925

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2025-12-14T18:55:26.722Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #2 in the year 2019 (2019-01-11 UTC)

IRIDIUM 173 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 173, 43925 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago