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USA 25 (18025)
COSPAR: 1987-043H | Alt Name: USA-25
Image
Additional Sources
Launch Details
Launch Date
May 15, 1987
Launch Site
AFWTR
Launch Pad
SLC3E
Launch Vehicle
Atlas H
Orbital Elements
NORAD ID
18025
International Designator
1987-043H
Epoch
Sat, 04 Jul 2026 06:47:18 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
63.29°
Right Ascension
304.59°
Eccentricity
Calculating...
Argument of Perigee
103.83°
Period
103.51 min
Mean Motion
13.91 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
USA 25
Alternative Name
USA-25
Type
Payload
Status
Unknown
Owner
NRO/NRL
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 18025U 87043H 26185.28284806 .00015045 00000-0 79260-3 0 9990
2 18025 63.2922 304.5883 0776568 103.8287 265.0341 13.91210772354254
Source: Celestrak
Summary
The satellite USA 25 (OBJECT_ID: 1987-043H) is a US-owned spacecraft designed for Ocean Surveillance and ELINT (Electronic Intelligence). Launched on May 15, 1987, from the AFWTR launch site using an Atlas H rocket, it has been operated by NRO/NRL. The satellite measures 0.9 meters in length with a diameter of 0.4 meters and spans 10 meters due to its gravity gradient stabilization configuration. It has a dry mass and launch mass of 200 kilograms each. Its power is supplied by four deployable solar arrays complemented by batteries, and it carries the payload PARCAE 9 SSU-3 for its mission purposes. The satellite's shape is described as box-like with an antenna attachment, and it was stabilized in orbit by May 30, 1987.
Physical Characteristics
Length
0.9
Diameter
0.4
Span
10
Dry Mass
200
Launch Mass
200
Shape
Box + Ant
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
PARCAE 9 SSU-3
Purpose
Ocean Surveillance, ELINT
Mission
Ocean Surveillance, ELINT
Manufacturer
MM
Life Expectancy
Unknown
Bus
NOSS SSU
Configuration
Gravity gradient stabilized
Motor
?
Equipment
?
Power System
4 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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