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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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ISO8601 Format

Identifier

42812, 2017-039K

Orbit

LEO

Last TLE update

13 hours ago

Origin

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 (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, 9.4 m

Radar Cross Section

14.423 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 13 hours ago

0 IRIDIUM 121
1 42812U 17039K   25193.88336749  .00000024  00000-0  16191-5 0  9994
2 42812  86.4003 135.5200 0002069  86.3361 273.8072 14.34217685421197

Epoch: 2025-07-12T21:12Z

TLE epoch observation values (Epoch: 2025-07-12T21:12:02.951Z)

Latitude

0.00006°

Longitude

-113.50684°

Altitude

780.62 km

Speed

7.464 km/s

True Right ascension

09h 02m 04s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-6.44179°

Longitude

-114.14419°

Altitude

781.803 km

Speed

7.463 km/s

Apparent Right ascension

09h 48m 18s

Apparent Declination

-22° 44' 30"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:59:46

Azimuth

46.688° ENE

Elevation

-67.117°

Doppler factor

Orbital elements

Apogee altitude

776.112 km

Perigee altitude

773.152 km

Semi-major axis

7,152.769 km

Eccentricity

0.00021

Inclination

86.4003°

RAAN

135.52°

Arg. of periapsis

86.3361°

True anomaly

Unknown

Mean anomaly

273.8072°

Eccentric anomaly

Unknown

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

0.0000016191

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

IRIDIUM 121 Visibility forecast

Observer location: undefined°, undefined°

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	2025-07-13 20:45:59.522Z	185.629° SSW	2025-07-13 20:49:59.522Z	319.331° NNW	44.367°	2025-07-13 20:53:59.522Z	359.83° N
7 mins	2025-07-14 07:16:59.522Z	33.314° NE	2025-07-14 07:19:59.522Z	77.676° E	23.045°	2025-07-14 07:23:59.522Z	131.781° SE
7 mins	2025-07-14 08:57:59.522Z	326.084° NNW	2025-07-14 09:00:59.522Z	270.404° WNW	29.54°	2025-07-14 09:04:59.522Z	213.75° SW

Authenticating...

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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.