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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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ISO8601 Format

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 (9 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: 10 hours ago

TLE from 10 hours ago

0 IRIDIUM 128
1 42811U 17039J   26130.18530933  .00000022  00000-0  87624-6 0  9997
2 42811  86.3992  41.0322 0002157  78.0860 282.0578 14.34217669464538

Epoch: 2026-05-10T04:26Z

TLE epoch observation values (Epoch: 2026-05-10T04:26:50.726Z)

Latitude

0.00004°

Longitude

106.32883°

Altitude

780.396 km

Speed

7.464 km/s

True Right ascension

02h 44m 07s

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

22:26:21

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.175 km

Perigee altitude

773.089 km

Semi-major axis

7,152.769 km

Eccentricity

0.00022

Inclination

86.3992°

RAAN

41.0322°

Arg. of periapsis

78.086°

True anomaly

282.03363°

Mean anomaly

282.0578°

Eccentric anomaly

282.04571°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

8.7624e-7

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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	2026-05-10 17:57:15.750Z	150.029° SSE	2026-05-10 18:02:15.750Z	72.125° E	30.508°	2026-05-10 18:06:15.750Z	20.628° NNE
6 mins	2026-05-10 19:40:15.750Z	245.957° WSW	2026-05-10 19:42:15.750Z	276.44° WNW	21.753°	2026-05-10 19:46:15.750Z	331.506° NNW
8 mins	2026-05-11 06:09:15.750Z	358.903° N	2026-05-11 06:13:15.750Z	165.327° S	44.226°	2026-05-11 06:17:15.750Z	177.585° S

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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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-05-10T04:26:50.726Z)

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: 10 hours ago