Showing default

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.

Not visible in the next 10 days

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/40374?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/40374?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

40374, 2015-002A

Orbit

GEO

Country

Related business

United States Navy (US)

Manufacturer

LMSS/LMCSS

Mission

Operational Defense Communications

Bus & Motor

A2100, BT-4

Mass

6,800 kg wet, 3,800 kg dry

Launch date (UTC)

2015-01-21 (11 years ago)

Launch vehicle

ATLAS V 551

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan + 1 Dish, 14.3 m

Radar Cross Section

71.298 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 19 hours ago

TLE from 19 hours ago

0 MUOS 3
1 40374U 15002A   25260.22290493 -.00000147  00000-0  00000-0 0  9995
2 40374   4.0031  41.7164 0059466 178.5389 200.8623  1.00270291 38859

Epoch: 2025-09-17T05:20Z

TLE epoch observation values (Epoch: 2025-09-17T05:20:58.985Z)

Latitude

1.29416°

Longitude

-15.82012°

Altitude

36,020.191 km

Speed

3.058 km/s

True Right ascension

04h 03m 18s

True Declination

1° 17' 34"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

16:51:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,038.822 km

Perigee altitude

35,537.331 km

Semi-major axis

42,166.214 km

Eccentricity

0.00595

Inclination

4.0031°

RAAN

41.7164°

Arg. of periapsis

178.5389°

True anomaly

200.6213°

Mean anomaly

200.8623°

Eccentric anomaly

200.74163°

Mean motion

0.25067 °/min

Orbital period

1,436.17 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #2 in the year 2015 (2015-01-21 UTC)

ATLAS 5 CENTAUR R/B, 40375

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

MUOS 3 Visibility

Loading observer location...
Set Observer location

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.
MUOS 3 is likely not visible in the next few days.

Loading historical data...

40374 neighbors

Authenticating...

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

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

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

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 ascending order

Check out MUOS 3, 40374 on other resources

View MUOS 3, 40374 on NASA - NSSDCA Website

View MUOS 3, 40374 on Heavens-Above

View MUOS 3, 40374 on Keep Track

View MUOS 3, 40374 on Celestrak

View MUOS 3, 40374 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

MUOS 3, 40374

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2025-09-17T05:20:58.985Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #2 in the year 2015 (2015-01-21 UTC)

MUOS 3 Visibility

40374 neighbors

Co-orbital & Co-planar RSOs

Check out MUOS 3, 40374 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 19 hours ago