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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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: 7 hours ago
TLE from 7 hours ago
0 IRIDIUM 121
1 42812U 17039K 26306.51864468 .00000047 00000-0 97629-5 0 9995
2 42812 86.3924 295.8542 0002302 89.4091 270.7368 14.34217485489658Epoch: 2026-11-02T12:26Z
TLE epoch observation values (Epoch: 2026-11-02T12:26:50.900Z)
Latitude
-0.00007°
Longitude
67.3476°
Altitude
780.698 km
Speed
7.464 km/s
True Right ascension
19h 43m 25s
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
15:05:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.279 km
Perigee altitude
772.986 km
Semi-major axis
7,152.77 km
Eccentricity
0.00023
Inclination
86.3924°
RAAN
295.8542°
Arg. of periapsis
89.4091°
True anomaly
270.71042°
Mean anomaly
270.7368°
Eccentric anomaly
270.72361°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000097629
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-11-02 22:39:02.119Z | 103.244° ESE | 2026-11-02 22:41:02.119Z | 79.551° E | 13.785° | 2026-11-02 22:43:02.119Z | 55.29° ENE |
| 8 mins | 2026-11-03 00:18:02.119Z | 197.673° SSW | 2026-11-03 00:21:02.119Z | 258.5° W | 63.826° | 2026-11-03 00:26:02.119Z | 355.463° N |
| 7 mins | 2026-11-03 10:49:02.119Z | 33.441° NE | 2026-11-03 10:52:02.119Z | 87.896° E | 31.309° | 2026-11-03 10:56:02.119Z | 141.399° SSE |
| 7 mins | 2026-11-03 12:29:02.119Z | 325.878° NNW | 2026-11-03 12:32:02.119Z | 282.132° WNW | 27.627° | 2026-11-03 12:36:02.119Z | 224.054° SW |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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