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IRIDIUM 139, 42963

Orbit data source: Space-Track

IRIDIUM 139, 42963 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/42963?theme=dark&initialShowStats=false

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Identifier

42963, 2017-061J

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: 13 hours ago

TLE from 13 hours ago

0 IRIDIUM 139
1 42963U 17061J   26095.97970342  .00000337  00000-0  11333-3 0  9999
2 42963  86.3961  55.4918 0002309  88.9702 271.1759 14.34214997444490

Epoch: 2026-04-05T23:30Z

TLE epoch observation values (Epoch: 2026-04-05T23:30:46.375Z)

Latitude

0.00004°

Longitude

-131.47878°

Altitude

780.694 km

Speed

7.464 km/s

True Right ascension

03h 41m 58s

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

18:06:30

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.292 km

Perigee altitude

772.989 km

Semi-major axis

7,152.778 km

Eccentricity

0.00023

Inclination

86.3961°

RAAN

55.4918°

Arg. of periapsis

88.9702°

True anomaly

271.14945°

Mean anomaly

271.1759°

Eccentric anomaly

271.16267°

Mean motion

3.58782 °/min

Orbital period

100.34 mins

BSTAR

0.00011333

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

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IRIDIUM 139 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 21:23:47.460Z	160.305° S	2026-04-06 21:27:47.460Z	95.997° ESE	38.272°	2026-04-06 21:32:47.460Z	13.231° NNE
5 mins	2026-04-06 23:06:47.460Z	255.146° W	2026-04-06 23:08:47.460Z	281.141° WNW	16.277°	2026-04-06 23:11:47.460Z	319.424° NNW
8 mins	2026-04-07 09:35:47.460Z	347.71° N	2026-04-07 09:38:47.460Z	295.532° NW	42.084°	2026-04-07 09:43:47.460Z	190.049° 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 139, 42963 on other resources

View IRIDIUM 139, 42963 on NASA - NSSDCA Website

View IRIDIUM 139, 42963 on Heavens-Above

View IRIDIUM 139, 42963 on Keep Track

View IRIDIUM 139, 42963 on Celestrak

View IRIDIUM 139, 42963 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 139, 42963

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-04-05T23:30:46.375Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

IRIDIUM 139 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 139, 42963 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago