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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: 2 days ago

TLE from 2 days ago

0 IRIDIUM 121
1 42812U 17039K   26314.33272076 -.00000032  00000-0 -18562-4 0  9996
2 42812  86.3927 292.5836 0002113  88.0176 272.1262 14.34216708490771

Epoch: 2026-11-10T07:59Z

TLE epoch observation values (Epoch: 2026-11-10T07:59:07.073Z)

Latitude

-0.00001°

Longitude

123.3077°

Altitude

780.666 km

Speed

7.464 km/s

True Right ascension

19h 30m 20s

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

00:59:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

776.147 km

Perigee altitude

773.124 km

Semi-major axis

7,152.772 km

Eccentricity

0.00021

Inclination

86.3927°

RAAN

292.5836°

Arg. of periapsis

88.0176°

True anomaly

272.102°

Mean anomaly

272.1262°

Eccentric anomaly

272.1141°

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

-0.000018562

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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.
8 mins	2026-11-12 10:48:46.745Z	355.392° N	2026-11-12 10:51:46.745Z	334.54° NNW	76.243°	2026-11-12 10:56:46.745Z	181.691° SSW
6 mins	2026-11-12 22:04:46.745Z	122.765° SE	2026-11-12 22:07:46.745Z	80.061° E	22.747°	2026-11-12 22:10:46.745Z	38.674° NE
8 mins	2026-11-12 23:44:46.745Z	218.28° SW	2026-11-12 23:47:46.745Z	268.003° W	38.161°	2026-11-12 23:52:46.745Z	345.52° 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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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: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-11-10T07:59:07.073Z)

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: 2 days ago