X Report 11 Jun 2025
SpaceX successfully launched 23 Starlink satellites while facing delays in launching the Axiom Space mission due to a propellant leak. Additionally, new US broadband rules favor Starlink's expansion into rural markets.
MUOS-4 (40887)
COSPAR: 2015-044A | Alt Name: MUOS 4
Image
Additional Sources
Launch Details
Launch Date
September 2, 2015
Launch Site
Launch Pad
SLC41
Launch Vehicle
Atlas V 551
Orbital Elements
NORAD ID
40887
International Designator
2015-044A
Epoch
Sat, 04 Jul 2026 03:58:43 GMT
Apogee
Calculating...
Perigee
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Inclination
4.36°
Right Ascension
42.33°
Eccentricity
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Argument of Perigee
3.33°
Period
1436.09 min
Mean Motion
1.00 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
MUOS-4
Alternative Name
MUOS 4
Type
Payload
Status
Operational
Owner
SPAWSD
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 40887U 15044A 26185.16578381 -.00000082 00000-0 00000-0 0 9993
2 40887 4.3596 42.3297 0057225 3.3344 11.1896 1.00272007 39738
Source: Celestrak
Summary
MUOS-4 is a communications satellite (Comsat) owned by SPAWSD and operated under the mission name MUOS SV 5. It was launched on September 2, 2015, from Space Launch Complex 41 at Cape Canaveral Air Force Station using an Atlas V 551 launch vehicle. The spacecraft is based on the A2100M bus configuration and has dimensions of 7.9 meters in length, 4.3 meters in diameter, and a span of 28.7 meters due to its solar arrays. At launch, it weighed 6,800 kilograms with a dry mass of 3,800 kilograms. The satellite is equipped with two deployable solar arrays and batteries for power generation and has an expected operational lifetime of 15 years. Its shape consists of a box structure plus two panels and a dish antenna, providing it with a radar cross-section (RCS) value of 99.6156 square meters. Manufactured by LMSS/LMCSS, MUOS-4 serves as part of the military communications satellite constellation.
Physical Characteristics
Length
7.9
Diameter
4.3
Span
28.7
Dry Mass
3800
Launch Mass
6800
Shape
Box + 2 Pan + Dish
Radar Cross Section
99.6156
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
MUOS SV 5
Purpose
Comsat
Mission
Comsat
Manufacturer
LMSS/LMCSS
Life Expectancy
15 years
Bus
A2100
Configuration
A2100M
Motor
BT-4
Equipment
?
Power System
2 deployable solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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