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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

10 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 10 hours ago

0 IRIDIUM 121
1 42812U 17039K   25189.90656180  .00000011  00000-0 -32076-5 0  9993
2 42812  86.4001 137.1803 0002074  86.6830 273.4603 14.34217604420626

Epoch: 2025-07-08T21:45Z

TLE epoch observation values (Epoch: 2025-07-08T21:45:26.939Z)

Latitude

-0.00003°

Longitude

-116.27677°

Altitude

780.629 km

Speed

7.464 km/s

True Right ascension

09h 08m 43s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

37.74152°

Longitude

-113.67822°

Altitude

781.986 km

Speed

7.467 km/s

Apparent Right ascension

08h 46m 19s

Apparent Declination

1° 35' 39"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

20:08:20

Azimuth

345.845° N

Elevation

-47.589°

Doppler factor

Orbital elements

Apogee altitude

776.116 km

Perigee altitude

773.149 km

Semi-major axis

7,152.769 km

Eccentricity

0.00021

Inclination

86.4001°

RAAN

137.1803°

Arg. of periapsis

86.683°

True anomaly

Unknown

Mean anomaly

273.4603°

Eccentric anomaly

Unknown

Mean motion

3.58783 °/min

Orbital period

100.34 mins

BSTAR

-0.0000032076

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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.
9 mins	2025-07-09 08:22:44.968Z	7.062° NNE	2025-07-09 08:26:44.968Z	60.726° ENE	39.9°	2025-07-09 08:31:44.968Z	163.622° S
4 mins	2025-07-09 10:05:44.968Z	302.124° NW	2025-07-09 10:07:44.968Z	276.446° WNW	14.365°	2025-07-09 10:09:44.968Z	252.526° W
8 mins	2025-07-09 21:19:44.968Z	197.421° SSW	2025-07-09 21:22:44.968Z	248.456° W	41.264°	2025-07-09 21:27:44.968Z	354.817° N
7 mins	2025-07-10 07:50:44.968Z	31.731° NE	2025-07-10 07:53:44.968Z	84.984° E	27.709°	2025-07-10 07:57:44.968Z	140.915° SSE

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.