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: 4 hours ago
TLE from 4 hours ago
0 IRIDIUM 121
1 42812U 17039K 26262.91332205 .00000138 00000-0 42119-4 0 9993
2 42812 86.3974 314.0981 0002166 94.6833 265.4611 14.34217832483409Epoch: 2026-09-19T21:55Z
TLE epoch observation values (Epoch: 2026-09-19T21:55:11.025Z)
Latitude
0.00008°
Longitude
-13.51287°
Altitude
780.841 km
Speed
7.463 km/s
True Right ascension
20h 56m 23s
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
19:03:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.181 km
Perigee altitude
773.082 km
Semi-major axis
7,152.768 km
Eccentricity
0.00022
Inclination
86.3974°
RAAN
314.0981°
Arg. of periapsis
94.6833°
True anomaly
265.43636°
Mean anomaly
265.4611°
Eccentric anomaly
265.44873°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000042119
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-09-20 03:04:19.440Z | 127.596° SE | 2026-09-20 03:08:19.440Z | 74.29° E | 21.664° | 2026-09-20 03:11:19.440Z | 36.236° NE |
| 7 mins | 2026-09-20 04:45:19.440Z | 219.717° SW | 2026-09-20 04:48:19.440Z | 277.807° WNW | 40.277° | 2026-09-20 04:52:19.440Z | 342.838° N |
| 8 mins | 2026-09-20 15:15:19.440Z | 15.525° NNE | 2026-09-20 15:18:19.440Z | 65.555° ENE | 48.247° | 2026-09-20 15:23:19.440Z | 157.623° S |
| 5 mins | 2026-09-20 16:57:19.440Z | 304.255° NW | 2026-09-20 16:59:19.440Z | 276.535° WNW | 17.766° | 2026-09-20 17:02:19.440Z | 240.459° WSW |
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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