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: 9 hours ago
TLE from 9 hours ago
0 IRIDIUM 121
1 42812U 17039K 25300.90827256 .00000174 00000-0 55096-4 0 9997
2 42812 86.3927 90.7747 0001885 92.8452 267.2960 14.34219430436534Epoch: 2025-10-27T21:47Z
TLE epoch observation values (Epoch: 2025-10-27T21:47:54.749Z)
Latitude
0.00004°
Longitude
87.29321°
Altitude
780.776 km
Speed
7.463 km/s
True Right ascension
06h 03m 05s
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
01:50:59
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
775.974 km
Perigee altitude
773.278 km
Semi-major axis
7,152.763 km
Eccentricity
0.00019
Inclination
86.3927°
RAAN
90.7747°
Arg. of periapsis
92.8452°
True anomaly
267.27442°
Mean anomaly
267.296°
Eccentric anomaly
267.28521°
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
0.000055096
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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 | 2025-10-28 09:39:02.041Z | 126.971° SE | 2025-10-28 09:42:02.041Z | 89.372° E | 20.16° | 2025-10-28 09:46:02.041Z | 35.375° NE |
| 7 mins | 2025-10-28 11:20:02.041Z | 220.7° SW | 2025-10-28 11:23:02.041Z | 280.523° WNW | 32.701° | 2025-10-28 11:27:02.041Z | 343.338° N |
| 8 mins | 2025-10-28 21:50:02.041Z | 16.203° NNE | 2025-10-28 21:53:02.041Z | 70.565° E | 37.101° | 2025-10-28 21:58:02.041Z | 158.325° S |
| 4 mins | 2025-10-28 23:32:02.041Z | 302.509° NW | 2025-10-28 23:34:02.041Z | 274.548° WNW | 16.728° | 2025-10-28 23:36:02.041Z | 248.899° W |
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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