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IRIDIUM 121, 42812

Orbit data source: Space-Track

IRIDIUM 121, 42812 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/42812?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/42812?theme=dark&initialShowStats=false

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Identifier

42812, 2017-039K

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: 8 hours ago

TLE from 8 hours ago

0 IRIDIUM 121
1 42812U 17039K   26086.88734078  .00000286  00000-0  95122-4 0  9993
2 42812  86.4003  27.6345 0002295  86.2850 273.8608 14.34216229458177

Epoch: 2026-03-27T21:17Z

TLE epoch observation values (Epoch: 2026-03-27T21:17:46.243Z)

Latitude

-0.00004°

Longitude

-117.12367°

Altitude

780.613 km

Speed

7.464 km/s

True Right ascension

01h 50m 32s

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

10:12:05

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.278 km

Perigee altitude

772.995 km

Semi-major axis

7,152.774 km

Eccentricity

0.00023

Inclination

86.4003°

RAAN

27.6345°

Arg. of periapsis

86.285°

True anomaly

273.83456°

Mean anomaly

273.8608°

Eccentric anomaly

273.84768°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.000095122

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Other satellites on launch #39 in the year 2017 (2017-06-25 UTC)

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IRIDIUM 121 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	2026-03-28 07:55:04.278Z	5.394° NNE	2026-03-28 07:59:04.278Z	56.075° ENE	41.083°	2026-03-28 08:04:04.278Z	166.287° S
4 mins	2026-03-28 19:14:04.278Z	94.92° ESE	2026-03-28 19:15:04.278Z	82.055° E	14.463°	2026-03-28 19:18:04.278Z	45.931° ENE
8 mins	2026-03-28 20:52:04.278Z	200.703° SSW	2026-03-28 20:55:04.278Z	252.369° W	39.965°	2026-03-28 21:00:04.278Z	353.201° 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 121, 42812 on other resources

View IRIDIUM 121, 42812 on NASA - NSSDCA Website

View IRIDIUM 121, 42812 on Heavens-Above

View IRIDIUM 121, 42812 on Keep Track

View IRIDIUM 121, 42812 on Celestrak

View IRIDIUM 121, 42812 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 121, 42812

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: 2026-03-27T21:17:46.243Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #39 in the year 2017 (2017-06-25 UTC)

IRIDIUM 121 Visibility forecast

Co-orbital & Co-planar RSOs

Check out IRIDIUM 121, 42812 on other resources

Documentation

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