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: 22 hours ago
TLE from 22 hours ago
0 IRIDIUM 121
1 42812U 17039K 25315.28058970 .00000255 00000-0 83900-4 0 9998
2 42812 86.3946 84.7632 0002037 96.5886 263.5541 14.34218238438590Epoch: 2025-11-11T06:44Z
TLE epoch observation values (Epoch: 2025-11-11T06:44:02.950Z)
Latitude
-0.00007°
Longitude
-66.9185°
Altitude
780.88 km
Speed
7.463 km/s
True Right ascension
05h 39m 03s
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
00:48:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.087 km
Perigee altitude
773.173 km
Semi-major axis
7,152.767 km
Eccentricity
0.0002
Inclination
86.3946°
RAAN
84.7632°
Arg. of periapsis
96.5886°
True anomaly
263.53091°
Mean anomaly
263.5541°
Eccentric anomaly
263.5425°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000839
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-11-12 08:00:18.694Z | 106.327° ESE | 2025-11-12 08:02:18.694Z | 81.718° E | 14.757° | 2025-11-12 08:05:18.694Z | 45.44° ENE |
| 8 mins | 2025-11-12 09:39:18.694Z | 201.695° SSW | 2025-11-12 09:42:18.694Z | 254.594° W | 39.693° | 2025-11-12 09:47:18.694Z | 352.881° N |
| 7 mins | 2025-11-12 20:10:18.694Z | 29.678° NE | 2025-11-12 20:13:18.694Z | 85.945° E | 29.667° | 2025-11-12 20:17:18.694Z | 143.911° SSE |
| 6 mins | 2025-11-12 21:51:18.694Z | 314.727° NW | 2025-11-12 21:53:18.694Z | 283.759° WNW | 22.757° | 2025-11-12 21:57:18.694Z | 227.653° WSW |
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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