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: 19 hours ago
TLE from 19 hours ago
0 IRIDIUM 121
1 42812U 17039K 25310.81540485 .00000045 00000-0 89986-5 0 9997
2 42812 86.3941 86.6306 0002039 95.8890 264.2538 14.34217631437952Epoch: 2025-11-06T19:34Z
TLE epoch observation values (Epoch: 2025-11-06T19:34:10.979Z)
Latitude
-0.00002°
Longitude
106.81655°
Altitude
780.865 km
Speed
7.463 km/s
True Right ascension
05h 46m 31s
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
10:56:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.091 km
Perigee altitude
773.174 km
Semi-major axis
7,152.769 km
Eccentricity
0.0002
Inclination
86.3941°
RAAN
86.6306°
Arg. of periapsis
95.889°
True anomaly
264.23055°
Mean anomaly
264.2538°
Eccentric anomaly
264.24218°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000089986
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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 | 2025-11-07 21:15:47.060Z | 359.464° N | 2025-11-07 21:19:47.060Z | 22.875° NE | 44.038° | 2025-11-07 21:24:47.060Z | 176.083° S |
| 6 mins | 2025-11-08 08:32:47.060Z | 120.137° SE | 2025-11-08 08:35:47.060Z | 81.236° E | 18.494° | 2025-11-08 08:38:47.060Z | 41.692° NE |
| 8 mins | 2025-11-08 10:12:47.060Z | 212.078° SW | 2025-11-08 10:15:47.060Z | 263.63° W | 34.826° | 2025-11-08 10:20:47.060Z | 348.122° N |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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