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USA 76 (21808)
COSPAR: 1991-076D | Alt Name: USA 76
Image
Additional Sources
Launch Details
Launch Date
November 8, 1991
Launch Site
AFWTR
Launch Pad
SLC4E
Launch Vehicle
Titan 403A
Orbital Elements
NORAD ID
21808
International Designator
1991-076D
Epoch
Sat, 04 Jul 2026 05:42:20 GMT
Apogee
Calculating...
Perigee
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Inclination
63.30°
Right Ascension
107.21°
Eccentricity
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Argument of Perigee
74.81°
Period
105.89 min
Mean Motion
13.60 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
USA 76
Alternative Name
USA 76
Type
Payload
Status
Unknown
Owner
NRO/NRL
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21808U 91076D 26185.23773574 .00009751 00000-0 74306-3 0 9997
2 21808 63.2988 107.2075 0884122 74.8081 294.8900 13.59947923108353
Source: Celestrak
Summary
USA 76, also known by its OBJECT_ID 1991-076D, is a NOSS B SSU (Navy Ocean Surveillance Satellite) launched on November 8, 1991, from the AFWTR at SLC4E using a Titan 403A launch vehicle. The satellite measures approximately 1 meter in length and diameter with a span of 10 meters, and has a dry mass of 400 kilograms. It was manufactured by NRL (Naval Research Laboratory) for ocean surveillance and ELINT (Electronic Intelligence) purposes, equipped with an Improved PARCAE 2 SSU-2 payload. The satellite reached stability on November 9, 1991. Further details about its power source, motor, equipment, and other specifications are not provided in the data set.
Physical Characteristics
Length
1
Diameter
1
Span
10
Dry Mass
400
Launch Mass
400
Shape
Box + Ant
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Improved PARCAE 2 SSU-2
Purpose
Ocean Surveillance, ELINT
Mission
Ocean Surveillance, ELINT
Manufacturer
Naval Research Laboratory
Life Expectancy
Unknown
Bus
NOSS B SSU
Configuration
?
Motor
?
Equipment
?
Power System
Unknown
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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