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IRIDIUM 128, 42811

Orbit data source: Space-Track

IRIDIUM 128, 42811 is a payload satellite owned by Iridium (US) in LEO that was launched on Sun, 25 Jun 2017 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 src="https://www.satcat.com/sats-embedded/42811?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/42811?theme=dark&initialShowStats=false

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Identifier

42811, 2017-039J

Orbit

LEO

Country

Related business

Iridium Communications Inc. (US)

Manufacturer

OATK SSG Gilbert

Mission

Operational Commercial Communications

Bus & Motor

ELITEBUS, Unknown motor

Mass

860 kg wet, 700 kg dry

Launch date (UTC)

2017-06-25 (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: 6 hours ago

TLE from 6 hours ago

0 IRIDIUM 128
1 42811U 17039J   25345.32253158  .00000596  00000-0  20566-3 0  9996
2 42811  86.3963 103.7120 0002337 100.6516 259.4943 14.34218751443059

Epoch: 2025-12-11T07:44Z

TLE epoch observation values (Epoch: 2025-12-11T07:44:26.728Z)

Latitude

-0.00003°

Longitude

-92.67953°

Altitude

781.02 km

Speed

7.463 km/s

True Right ascension

06h 54m 50s

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

11:37:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.3 km

Perigee altitude

772.957 km

Semi-major axis

7,152.765 km

Eccentricity

0.00023

Inclination

86.3963°

RAAN

103.712°

Arg. of periapsis

100.6516°

True anomaly

259.46797°

Mean anomaly

259.4943°

Eccentric anomaly

259.48113°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.00020566

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Other satellites on launch #39 in the year 2017 (2017-06-25 UTC)

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IRIDIUM 128 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	2025-12-11 20:02:02.932Z	3.513° NNE	2025-12-11 20:07:02.932Z	113.73° SE	42.49°	2025-12-11 20:11:02.932Z	168.414° S
4 mins	2025-12-12 07:21:02.932Z	97.643° ESE	2025-12-12 07:22:02.932Z	84.484° E	15.372°	2025-12-12 07:25:02.932Z	46.77° ENE
8 mins	2025-12-12 08:59:02.932Z	202.75° SW	2025-12-12 09:03:02.932Z	293.891° NW	38.775°	2025-12-12 09:07:02.932Z	351.194° N

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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 128, 42811 on other resources

View IRIDIUM 128, 42811 on NASA - NSSDCA Website

View IRIDIUM 128, 42811 on Heavens-Above

View IRIDIUM 128, 42811 on Keep Track

View IRIDIUM 128, 42811 on Celestrak

View IRIDIUM 128, 42811 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 128, 42811

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2025-12-11T07:44:26.728Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #39 in the year 2017 (2017-06-25 UTC)

IRIDIUM 128 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 128, 42811 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago