Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/42963?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/42963?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

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: 7 hours ago

TLE from 7 hours ago

0 IRIDIUM 139
1 42963U 17061J   25356.81530903  .00000127  00000-0  38342-4 0  9993
2 42963  86.3972  99.0708 0002146  99.6808 260.4630 14.34218597429568

Epoch: 2025-12-22T19:34Z

TLE epoch observation values (Epoch: 2025-12-22T19:34:02.700Z)

Latitude

-0.00004°

Longitude

73.95156°

Altitude

780.97 km

Speed

7.463 km/s

True Right ascension

06h 36m 16s

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

01:15:34

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.164 km

Perigee altitude

773.094 km

Semi-major axis

7,152.766 km

Eccentricity

0.00021

Inclination

86.3972°

RAAN

99.0708°

Arg. of periapsis

99.6808°

True anomaly

260.43875°

Mean anomaly

260.463°

Eccentric anomaly

260.45087°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.000038342

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

IRIDIUM 139 Visibility forecast

Loading observer location...
Set Observer location

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.
10 mins	2025-12-23 07:23:32.081Z	172.413° S	2025-12-23 07:28:32.081Z	80.425° E	43.345°	2025-12-23 07:33:32.081Z	7.205° NNE
5 mins	2025-12-23 17:56:32.081Z	47.972° ENE	2025-12-23 17:58:32.081Z	75.262° E	17.205°	2025-12-23 18:01:32.081Z	113.731° SE
8 mins	2025-12-23 19:36:32.081Z	337.21° NNW	2025-12-23 19:39:32.081Z	274.731° WNW	37.142°	2025-12-23 19:44:32.081Z	199.116° SSW

Items per page:

1–3 of 3 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 7 hours ago

TLE from 7 hours ago

TLE epoch observation values (Epoch: 2025-12-22T19:34:02.700Z)

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: 7 hours ago