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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: 8 hours ago

TLE from 8 hours ago

0 IRIDIUM 155
1 43573U 18061E   26256.57757462  .00000021  00000-0  49806-6 0  9998
2 43573  86.4001  19.7012 0002149  91.6048 268.5394 14.34217224426028

Epoch: 2026-09-13T13:51Z

TLE epoch observation values (Epoch: 2026-09-13T13:51:42.447Z)

Latitude

-0°

Longitude

179.20411°

Altitude

780.759 km

Speed

7.463 km/s

True Right ascension

01h 18m 48s

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

14:21:27

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.17 km

Perigee altitude

773.096 km

Semi-major axis

7,152.77 km

Eccentricity

0.00021

Inclination

86.4001°

RAAN

19.7012°

Arg. of periapsis

91.6048°

True anomaly

268.51478°

Mean anomaly

268.5394°

Eccentric anomaly

268.52709°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

4.9806e-7

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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	2026-09-14 08:23:20.634Z	158.491° S	2026-09-14 08:28:20.634Z	73.258° E	46.579°	2026-09-14 08:32:20.634Z	16.63° NNE
6 mins	2026-09-14 10:06:20.634Z	248.952° W	2026-09-14 10:09:20.634Z	289.75° WNW	18.69°	2026-09-14 10:12:20.634Z	326.206° NNW
8 mins	2026-09-14 20:35:20.634Z	351.871° N	2026-09-14 20:39:20.634Z	249.845° W	72.927°	2026-09-14 20:43:20.634Z	187.184° SSW

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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: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-09-13T13:51:42.447Z)

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: 8 hours ago