MUOS 3, 40374
Orbit data source: Space-Track
MUOS 3, 40374 is a payload satellite owned by SPAWAR Pacific (US) in GEO that was launched on Wed, 21 Jan 2015 UTC via an ATLAS V 551 launch vehicle from the Air Force Eastern Test Range (AFETR). 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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40374 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
LMSS/LMCSS
Mission
Operational Defense Communications
Bus & Motor
A2100, BT-4
Mass
6,800 kg wet, 3,800 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan + 1 Dish, 14.3 m
Radar Cross Section
71.298 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 20 hours ago
TLE from 20 hours ago
0 MUOS 3
1 40374U 15002A 25338.56898169 -.00000117 00000-0 00000+0 0 9998
2 40374 4.1502 42.3962 0058476 181.1733 39.4565 1.00271803 39637Epoch: 2025-12-04T13:39Z
TLE epoch observation values (Epoch: 2025-12-04T13:39:20.018Z)
Latitude
-2.74889°
Longitude
-15.09279°
Altitude
35,595.318 km
Speed
3.089 km/s
True Right ascension
17h 33m 27s
True Declination
-2° 44' 46"
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
07:19:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,034.221 km
Perigee altitude
35,541.083 km
Semi-major axis
42,165.789 km
Eccentricity
0.00585
Inclination
4.1502°
RAAN
42.3962°
Arg. of periapsis
181.1733°
True anomaly
39.88475°
Mean anomaly
39.4565°
Eccentric anomaly
39.67038°
Mean motion
0.25067 °/min
Orbital period
1,436.15 mins
BSTAR
0
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Other satellites on launch #2 in the year 2015 (2015-01-21 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.MUOS 3 Visibility
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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. |
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| MUOS 3 is likely not visible in the next few days. |
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40374 neighbors
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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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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