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NAVSTAR 20 (USA 63) (20724)
COSPAR: 1990-068A | Alt Name: GPS II-8
Image
Additional Sources
Launch Details
Launch Date
August 2, 1990
Launch Site
Launch Pad
LC17A
Launch Vehicle
Delta 6925
Orbital Elements
NORAD ID
20724
International Designator
1990-068A
Epoch
Fri, 03 Jul 2026 17:24:56 GMT
Apogee
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Perigee
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Inclination
54.94°
Right Ascension
73.98°
Eccentricity
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Argument of Perigee
332.02°
Period
769.29 min
Mean Motion
1.87 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 20 (USA 63)
Alternative Name
GPS II-8
Type
Payload
Status
Non-operational
Owner
AFSSD2
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 20724U 90068A 26184.72565275 -.00000027 00000-0 00000-0 0 9998
2 20724 54.9437 73.9834 0036697 332.0238 225.0062 1.87186410250218
Source: Celestrak
Summary
NAVSTAR 20 (USA 63), also known as GPS II-8, is a US satellite that was launched on August 2, 1990, from the Cape Canaveral Air Force Station using a Delta 6925 launch vehicle from Launch Pad LC17A. This GPS II model has dimensions of 2.4 meters in length and 1.8 meters in diameter with a span of 5.3 meters. The satellite is equipped with 2 deployable solar arrays and batteries, providing it with necessary power for operation. It has a dry mass of 776 kilograms and was designed to operate for about 7.5 years. NAVSTAR 20 serves as part of the GPS constellation, dedicated to navigation purposes and features a box shape with two panels. The satellite is stabilized on three axes and was manufactured by RWISB under the mission of providing accurate global positioning data for the US Air Force Space Systems Directorate (AFSSD2).
Physical Characteristics
Length
2.4
Diameter
1.8
Span
5.3
Dry Mass
776
Launch Mass
776
Shape
Box + 2 Pan
Radar Cross Section
2.5892
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
GPS SVN 21
Purpose
Navigation
Mission
Navigation
Manufacturer
RWISB
Life Expectancy
7.5 years
Bus
GPS II
Configuration
3-Axis stabilized
Motor
Star 37F
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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