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, 4.7 m
Radar Cross Section
14.423 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 IRIDIUM 121
1 42812U 17039K 25260.93091322 .00000046 00000-0 94246-5 0 9991
2 42812 86.3923 107.5059 0002201 84.9278 275.2169 14.34217398430809Epoch: 2025-09-17T22:20Z
TLE epoch observation values (Epoch: 2025-09-17T22:20:30.902Z)
Latitude
-0.00001°
Longitude
135.27735°
Altitude
780.576 km
Speed
7.464 km/s
True Right ascension
07h 10m 01s
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
21:09:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.207 km
Perigee altitude
773.059 km
Semi-major axis
7,152.77 km
Eccentricity
0.00022
Inclination
86.3923°
RAAN
107.5059°
Arg. of periapsis
84.9278°
True anomaly
275.19178°
Mean anomaly
275.2169°
Eccentric anomaly
275.20434°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.0000094246
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-09-18 13:31:44.024Z | 138.624° SSE | 2025-09-18 13:35:44.024Z | 87.793° E | 24.208° | 2025-09-18 13:39:44.024Z | 30.61° NE |
| 7 mins | 2025-09-18 15:13:44.024Z | 229.7° WSW | 2025-09-18 15:16:44.024Z | 283.524° WNW | 28.095° | 2025-09-18 15:20:44.024Z | 339.954° N |
| 8 mins | 2025-09-19 01:43:44.024Z | 10.399° NNE | 2025-09-19 01:46:44.024Z | 71.644° E | 41.416° | 2025-09-19 01:51:44.024Z | 166.115° S |
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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