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: 1 day ago
TLE from 1 day ago
0 IRIDIUM 121
1 42812U 17039K 25260.02392225 .00000054 00000-0 12177-4 0 9998
2 42812 86.3924 107.8854 0002198 84.8921 275.2526 14.34217444430679Epoch: 2025-09-17T00:34Z
TLE epoch observation values (Epoch: 2025-09-17T00:34:26.882Z)
Latitude
0.00002°
Longitude
103.06758°
Altitude
780.575 km
Speed
7.464 km/s
True Right ascension
07h 11m 32s
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
18:08:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.205 km
Perigee altitude
773.061 km
Semi-major axis
7,152.77 km
Eccentricity
0.00022
Inclination
86.3924°
RAAN
107.8854°
Arg. of periapsis
84.8921°
True anomaly
275.22752°
Mean anomaly
275.2526°
Eccentric anomaly
275.24006°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000012177
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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 | 2025-09-18 02:15:51.873Z | 352.057° N | 2025-09-18 02:20:51.873Z | 237.734° WSW | 42.685° | 2025-09-18 02:24:51.873Z | 188.532° SSW |
| 7 mins | 2025-09-18 13:32:51.873Z | 129.913° SE | 2025-09-18 13:35:51.873Z | 85.221° E | 24.274° | 2025-09-18 13:39:51.873Z | 29.652° NE |
| 7 mins | 2025-09-18 15:13:51.873Z | 231.106° WSW | 2025-09-18 15:16:51.873Z | 286.563° WNW | 27.983° | 2025-09-18 15:20:51.873Z | 340.776° N |
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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