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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.

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Iframe URL

https://www.satcat.com/sats-embedded/43573?theme=dark&initialShowStats=false

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Identifier

43573, 2018-061E

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)

2018-07-25 (8 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: 2 days ago

TLE from 2 days ago

0 IRIDIUM 155
1 43573U 18061E   26171.39021337  .00000014  00000-0 -19774-5 0  9992
2 43573  86.3954  55.3337 0001983  83.1728 276.9694 14.34217628413813

Epoch: 2026-06-20T09:21Z

TLE epoch observation values (Epoch: 2026-06-20T09:21:54.435Z)

Latitude

0.00006°

Longitude

6.25137°

Altitude

780.547 km

Speed

7.464 km/s

True Right ascension

03h 41m 20s

True Declination

0° 00' 00"

Sunlit

Object was in daylight 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

21:34:46

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.05 km

Perigee altitude

773.214 km

Semi-major axis

7,152.769 km

Eccentricity

0.0002

Inclination

86.3954°

RAAN

55.3337°

Arg. of periapsis

83.1728°

True anomaly

276.94684°

Mean anomaly

276.9694°

Eccentric anomaly

276.95812°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

-0.0000019774

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Other satellites on launch #61 in the year 2018 (2018-07-25 UTC)

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IRIDIUM 155 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	2026-06-22 16:43:44.746Z	182.522° SSW	2026-06-22 16:48:44.746Z	342.888° N	44.516°	2026-06-22 16:52:44.746Z	1.336° NNE
7 mins	2026-06-23 03:15:44.746Z	34.709° NE	2026-06-23 03:18:44.746Z	78.308° E	21.983°	2026-06-23 03:22:44.746Z	130.506° SE
7 mins	2026-06-23 04:56:44.746Z	327.265° NNW	2026-06-23 04:59:44.746Z	269.218° W	30.794°	2026-06-23 05:03:44.746Z	211.726° 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 155, 43573 on other resources

View IRIDIUM 155, 43573 on NASA - NSSDCA Website

View IRIDIUM 155, 43573 on Heavens-Above

View IRIDIUM 155, 43573 on Keep Track

View IRIDIUM 155, 43573 on Celestrak

View IRIDIUM 155, 43573 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 155, 43573

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T09:21:54.435Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #61 in the year 2018 (2018-07-25 UTC)

IRIDIUM 155 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 155, 43573 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago