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IRIDIUM 129, 42958

Orbit data source: Space-Track

IRIDIUM 129, 42958 is a payload satellite owned by Iridium (US) in LEO that was launched on Mon, 09 Oct 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 URL

https://www.satcat.com/sats-embedded/42958?theme=dark&initialShowStats=false

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Identifier

42958, 2017-061D

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)

2017-10-09 (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 129
1 42958U 17061D   25356.85336730  .00000115  00000-0  34075-4 0  9999
2 42958  86.3975  98.9940 0001726  93.8640 266.2753 14.34216654429522

Epoch: 2025-12-22T20:28Z

TLE epoch observation values (Epoch: 2025-12-22T20:28:50.934Z)

Latitude

-0.00005°

Longitude

60.13627°

Altitude

780.802 km

Speed

7.463 km/s

True Right ascension

06h 35m 58s

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

03:25:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

775.87 km

Perigee altitude

773.401 km

Semi-major axis

7,152.772 km

Eccentricity

0.00017

Inclination

86.3975°

RAAN

98.994°

Arg. of periapsis

93.864°

True anomaly

266.25556°

Mean anomaly

266.2753°

Eccentric anomaly

266.26543°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.000034075

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Other satellites on launch #61 in the year 2017 (2017-10-09 UTC)

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IRIDIUM 129 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.
8 mins	2025-12-23 06:39:00.908Z	135.102° SSE	2025-12-23 06:43:00.908Z	80.998° E	23.469°	2025-12-23 06:47:00.908Z	28.878° NE
8 mins	2025-12-23 08:20:00.908Z	222.291° SW	2025-12-23 08:23:00.908Z	267.975° W	28.709°	2025-12-23 08:28:00.908Z	342.826° N
8 mins	2025-12-23 18:50:00.908Z	8.908° NNE	2025-12-23 18:54:00.908Z	92.762° ESE	40.763°	2025-12-23 18:58:00.908Z	162.649° 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 129, 42958 on other resources

View IRIDIUM 129, 42958 on NASA - NSSDCA Website

View IRIDIUM 129, 42958 on Heavens-Above

View IRIDIUM 129, 42958 on Keep Track

View IRIDIUM 129, 42958 on Celestrak

View IRIDIUM 129, 42958 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 129, 42958

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: 2025-12-22T20:28:50.934Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #61 in the year 2017 (2017-10-09 UTC)

IRIDIUM 129 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 129, 42958 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago