Space Brief 6 Sep 2025
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NAVSTAR 56 (USA 180) (28474)
COSPAR: 2004-045A | Alt Name: GPS IIR-13
Image
Additional Sources
Launch Details
Launch Date
November 6, 2004
Launch Site
Launch Pad
SLC17B
Launch Vehicle
Delta 7925-9.5
Orbital Elements
NORAD ID
28474
International Designator
2004-045A
Epoch
Fri, 03 Jul 2026 18:00:25 GMT
Apogee
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Perigee
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Inclination
55.13°
Right Ascension
324.23°
Eccentricity
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Argument of Perigee
316.80°
Period
718.00 min
Mean Motion
2.01 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
NAVSTAR 56 (USA 180)
Alternative Name
GPS IIR-13
Type
Payload
Status
Operational
Owner
AFSMC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 28474U 04045A 26184.75029685 -.00000071 00000-0 00000-0 0 9990
2 28474 55.1258 324.2295 0170002 316.7952 40.0341 2.00556712158759
Source: Celestrak
Summary
NAVSTAR 56 (USA 180), also known as GPS IIR-13, is a satellite in the Series 4000 configuration launched by the United States on November 6, 2004. It was built by LMMS and deployed from Cape Canaveral Air Force Station's SLC17B pad using a Delta 7925-9.5 launch vehicle. The satellite has dimensions of 1.5 meters in length, 1.9 meters in diameter, and a span of 19.3 meters, with a dry mass of 910 kilograms and a launch mass of 1077 kilograms. It is equipped for navigation purposes and powered by two deployable solar arrays and batteries. The satellite has an expected lifetime of 10 years and was stabilized using the Star 37XFP motor. Its shape consists of a box with two panels, and it has a radar cross-section (RCS) value of 2.5118.
Physical Characteristics
Length
1.5
Diameter
1.9
Span
19.3
Dry Mass
910
Launch Mass
1077
Shape
Box + 2 Pan
Radar Cross Section
2.5118
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
GPS SVN 61
Purpose
Navigation
Mission
Navigation
Manufacturer
LMMS
Life Expectancy
10 years
Bus
Series 4000
Configuration
AS-4000
Motor
Star 37XFP
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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