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: 21 hours ago
TLE from 21 hours ago
0 IRIDIUM 121
1 42812U 17039K 25340.74609924 .00000551 00000-0 18959-3 0 9998
2 42812 86.3976 74.1173 0002181 95.4908 264.6537 14.34216312442244Epoch: 2025-12-06T17:54Z
TLE epoch observation values (Epoch: 2025-12-06T17:54:22.974Z)
Latitude
0.00002°
Longitude
89.75216°
Altitude
780.869 km
Speed
7.463 km/s
True Right ascension
04h 56m 28s
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
12:32:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
776.196 km
Perigee altitude
773.076 km
Semi-major axis
7,152.773 km
Eccentricity
0.00022
Inclination
86.3976°
RAAN
74.1173°
Arg. of periapsis
95.4908°
True anomaly
264.62882°
Mean anomaly
264.6537°
Eccentric anomaly
264.64126°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.00018959
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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 | 2025-12-07 17:55:18.518Z | 14.616° NNE | 2025-12-07 17:59:18.518Z | 68.688° E | 32.259° | 2025-12-07 18:04:18.518Z | 150.47° SSE |
| 5 mins | 2025-12-07 19:38:18.518Z | 307.587° NW | 2025-12-07 19:40:18.518Z | 276.813° WNW | 20.354° | 2025-12-07 19:43:18.518Z | 236.348° WSW |
| 8 mins | 2025-12-08 06:52:18.518Z | 179.592° S | 2025-12-08 06:55:18.518Z | 171.812° S | 43.953° | 2025-12-08 07:00:18.518Z | 3.165° 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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