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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42812 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
OATK SSG Gilbert
Mission
Operational Commercial Communications
Bus & Motor
ELITEBUS, Unknown motor
Mass
860 kg wet, 700 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Trap Box + 2 Pan, 4.8 m
Radar Cross Section
10.154 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 12 hours ago
TLE from 12 hours ago
0 IRIDIUM 121
1 42812U 17039K 25296.93146788 -.00000010 00000-0 -10613-4 0 9995
2 42812 86.3923 92.4390 0001814 92.7053 267.4350 14.34217569435963Epoch: 2025-10-23T22:21Z
TLE epoch observation values (Epoch: 2025-10-23T22:21:18.824Z)
Latitude
-0.00009°
Longitude
84.52692°
Altitude
780.777 km
Speed
7.463 km/s
True Right ascension
06h 09m 45s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
05:51:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.93 km
Perigee altitude
773.335 km
Semi-major axis
7,152.769 km
Eccentricity
0.00018
Inclination
86.3923°
RAAN
92.439°
Arg. of periapsis
92.7053°
True anomaly
267.41423°
Mean anomaly
267.435°
Eccentric anomaly
267.42462°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.000010613
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Other satellites on launch #39 in the year 2017 (2017-06-25 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.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 | 2025-10-24 11:51:55.625Z | 217.487° SW | 2025-10-24 11:55:55.625Z | 268.203° W | 27.183° | 2025-10-24 12:00:55.625Z | 341.431° N |
| 9 mins | 2025-10-24 22:22:55.625Z | 6.885° NNE | 2025-10-24 22:26:55.625Z | 92.699° ESE | 42.034° | 2025-10-24 22:31:55.625Z | 167.766° S |
| 4 mins | 2025-10-25 09:40:55.625Z | 100.007° ESE | 2025-10-25 09:42:55.625Z | 74.344° E | 14.534° | 2025-10-25 09:44:55.625Z | 50.095° ENE |
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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