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: 8 hours ago
TLE from 8 hours ago
0 IRIDIUM 121
1 42812U 17039K 26036.30516893 .00000175 00000-0 55477-4 0 9994
2 42812 86.3929 48.7847 0002115 90.3950 269.7488 14.34217276450920Epoch: 2026-02-05T07:19Z
TLE epoch observation values (Epoch: 2026-02-05T07:19:26.595Z)
Latitude
-0.00004°
Longitude
163.46458°
Altitude
780.727 km
Speed
7.463 km/s
True Right ascension
03h 15m 08s
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
17:13:30
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.146 km
Perigee altitude
773.12 km
Semi-major axis
7,152.77 km
Eccentricity
0.00021
Inclination
86.3929°
RAAN
48.7847°
Arg. of periapsis
90.395°
True anomaly
269.72456°
Mean anomaly
269.7488°
Eccentric anomaly
269.73668°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000055477
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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 | 2026-02-06 00:11:51.003Z | 126.825° SE | 2026-02-06 00:15:51.003Z | 74.79° E | 19.48° | 2026-02-06 00:18:51.003Z | 37.034° NE |
| 7 mins | 2026-02-06 01:52:51.003Z | 217.888° SW | 2026-02-06 01:55:51.003Z | 277.195° WNW | 33.729° | 2026-02-06 01:59:51.003Z | 343.698° N |
| 8 mins | 2026-02-06 12:22:51.003Z | 16.778° NNE | 2026-02-06 12:25:51.003Z | 67.533° E | 35.909° | 2026-02-06 12:30:51.003Z | 156.338° SSE |
| 5 mins | 2026-02-06 14:04:51.003Z | 304.436° NW | 2026-02-06 14:06:51.003Z | 276.051° WNW | 17.517° | 2026-02-06 14:09:51.003Z | 239.376° 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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