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: 19 hours ago
TLE from 19 hours ago
0 IRIDIUM 121
1 42812U 17039K 26045.51461441 .00000284 00000-0 94434-4 0 9992
2 42812 86.3932 44.9305 0002174 91.7031 268.4414 14.34218032452244Epoch: 2026-02-14T12:21Z
TLE epoch observation values (Epoch: 2026-02-14T12:21:02.685Z)
Latitude
0.00002°
Longitude
75.13274°
Altitude
780.76 km
Speed
7.463 km/s
True Right ascension
02h 59m 43s
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
10:10:20
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.186 km
Perigee altitude
773.076 km
Semi-major axis
7,152.768 km
Eccentricity
0.00022
Inclination
86.3932°
RAAN
44.9305°
Arg. of periapsis
91.7031°
True anomaly
268.4165°
Mean anomaly
268.4414°
Eccentric anomaly
268.42895°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000094434
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-02-15 10:42:31.886Z | 38.751° NE | 2026-02-15 10:45:31.886Z | 75.362° E | 15.668° | 2026-02-15 10:48:31.886Z | 111.861° ESE |
| 8 mins | 2026-02-15 12:23:31.886Z | 340.451° N | 2026-02-15 12:26:31.886Z | 275.007° WNW | 39.279° | 2026-02-15 12:31:31.886Z | 195.763° SSW |
| 8 mins | 2026-02-15 23:38:31.886Z | 141.023° SSE | 2026-02-15 23:42:31.886Z | 73.017° E | 28.687° | 2026-02-15 23:46:31.886Z | 22.206° NNE |
| 7 mins | 2026-02-16 01:19:31.886Z | 233.233° WSW | 2026-02-16 01:22:31.886Z | 276.281° WNW | 23.4° | 2026-02-16 01:26:31.886Z | 333.11° NNW |
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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