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: 17 hours ago
TLE from 17 hours ago
0 IRIDIUM 121
1 42812U 17039K 26266.61105224 .00000155 00000-0 48133-4 0 9994
2 42812 86.3969 312.5525 0002192 94.5594 265.5852 14.34218724483939Epoch: 2026-09-23T14:39Z
TLE epoch observation values (Epoch: 2026-09-23T14:39:54.913Z)
Latitude
-0.00005°
Longitude
90.114°
Altitude
780.836 km
Speed
7.463 km/s
True Right ascension
20h 50m 12s
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
01:19:06
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.196 km
Perigee altitude
773.061 km
Semi-major axis
7,152.765 km
Eccentricity
0.00022
Inclination
86.3969°
RAAN
312.5525°
Arg. of periapsis
94.5594°
True anomaly
265.56016°
Mean anomaly
265.5852°
Eccentric anomaly
265.57268°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000048133
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-09-24 14:40:52.153Z | 15.326° NNE | 2026-09-24 14:44:52.153Z | 69.452° E | 38.148° | 2026-09-24 14:49:52.153Z | 149.489° SSE |
| 6 mins | 2026-09-24 16:22:52.153Z | 319.333° NNW | 2026-09-24 16:25:52.153Z | 276.61° WNW | 22.575° | 2026-09-24 16:28:52.153Z | 235.554° WSW |
| 8 mins | 2026-09-25 03:37:52.153Z | 178.063° S | 2026-09-25 03:40:52.153Z | 160.447° S | 75.744° | 2026-09-25 03:45:52.153Z | 3.862° NNE |
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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