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

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ISO8601 Format

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: 10 hours ago

TLE from 10 hours ago

0 IRIDIUM 129
1 42958U 17061D   26095.94799020  .00000356  00000-0  11997-3 0  9999
2 42958  86.3960  55.4417 0002046  79.3958 280.7468 14.34220117444441

Epoch: 2026-04-05T22:45Z

TLE epoch observation values (Epoch: 2026-04-05T22:45:06.353Z)

Latitude

-0.00003°

Longitude

-120.08087°

Altitude

780.437 km

Speed

7.464 km/s

True Right ascension

03h 41m 46s

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

14:32:15

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.087 km

Perigee altitude

773.16 km

Semi-major axis

7,152.761 km

Eccentricity

0.0002

Inclination

86.396°

RAAN

55.4417°

Arg. of periapsis

79.3958°

True anomaly

280.72376°

Mean anomaly

280.7468°

Eccentric anomaly

280.73528°

Mean motion

3.58784 °/min

Orbital period

100.34 mins

BSTAR

0.00011997

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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.
9 mins	2026-04-06 09:22:07.694Z	359.255° N	2026-04-06 09:27:07.694Z	133.717° SE	44.606°	2026-04-06 09:31:07.694Z	175.689° S
7 mins	2026-04-06 20:39:07.694Z	123.409° SE	2026-04-06 20:42:07.694Z	87.014° E	18.274°	2026-04-06 20:46:07.694Z	36.217° NE
8 mins	2026-04-06 22:19:07.694Z	209.552° SW	2026-04-06 22:23:07.694Z	284.937° WNW	35.122°	2026-04-06 22:27:07.694Z	346.456° 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 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: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-04-05T22:45:06.353Z)

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: 10 hours ago