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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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Identifier
42812, 2017-039K
Orbit
LEO
Last TLE update
10 hours ago
Origin
Manufacturer
OATK SSG Gilbert
Mission
Operational Commercial Communications
Bus & Motor
ELITEBUS, Unknown motor
Mass
860 kg wet, 700 kg dry
Launch date (UTC)
2017-06-25 (8 years ago)
Launch vehicle
FALCON 9
Launch site
Air Force Western Test Range (AFWTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Trap Box + 2 Pan, 9.4 m
Radar Cross Section
14.423 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 10 hours ago
0 IRIDIUM 121
1 42812U 17039K   25189.90656180  .00000011  00000-0 -32076-5 0  9993
2 42812  86.4001 137.1803 0002074  86.6830 273.4603 14.34217604420626
Epoch: 2025-07-08T21:45Z
TLE epoch observation values (Epoch: 2025-07-08T21:45:26.939Z)
Latitude
-0.00003°
Longitude
-116.27677°
Altitude
780.629 km
Speed
7.464 km/s
True Right ascension
09h 08m 43s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
37.74152°
Longitude
-113.67822°
Altitude
781.986 km
Speed
7.467 km/s
Apparent Right ascension
08h 46m 19s
Apparent Declination
1° 35' 39"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
20:08:20
Azimuth
345.845° N
Elevation
-47.589°
Doppler factor
1
Orbital elements
Apogee altitude
776.116 km
Perigee altitude
773.149 km
Semi-major axis
7,152.769 km
Eccentricity
0.00021
Inclination
86.4001°
RAAN
137.1803°
Arg. of periapsis
86.683°
True anomaly
Unknown
Mean anomaly
273.4603°
Eccentric anomaly
Unknown
Mean motion
3.58783 °/min
Orbital period
100.34 mins
BSTAR
-0.0000032076
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IRIDIUM 121 Visibility forecast

Observer location: undefined°, undefined°

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 mins2025-07-09 08:22:44.968Z7.062° NNE2025-07-09 08:26:44.968Z60.726° ENE39.9°2025-07-09 08:31:44.968Z163.622° S
4 mins2025-07-09 10:05:44.968Z302.124° NW2025-07-09 10:07:44.968Z276.446° WNW14.365°2025-07-09 10:09:44.968Z252.526° W
8 mins2025-07-09 21:19:44.968Z197.421° SSW2025-07-09 21:22:44.968Z248.456° W41.264°2025-07-09 21:27:44.968Z354.817° N
7 mins2025-07-10 07:50:44.968Z31.731° NE2025-07-10 07:53:44.968Z84.984° E27.709°2025-07-10 07:57:44.968Z140.915° SSE
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