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USA 72 (21775)
COSPAR: 1991-076A | Alt Name: USA 72
Image
Additional Sources
Launch Details
Launch Date
November 8, 1991
Launch Site
AFWTR
Launch Pad
SLC4E
Launch Vehicle
Titan 403A
Orbital Elements
NORAD ID
21775
International Designator
1991-076A
Epoch
Tue, 30 Jun 2026 11:50:40 GMT
Apogee
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Perigee
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Inclination
63.35°
Right Ascension
204.85°
Eccentricity
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Argument of Perigee
273.11°
Period
260.21 min
Mean Motion
5.53 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
USA 72
Alternative Name
USA 72
Type
Payload
Status
Unknown
Owner
NRO/NRL
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21775U 91076A 26181.49352902 .00000038 00000-0 00000-0 0 9998
2 21775 63.3518 204.8506 3336690 273.1085 50.0001 5.53396856 43295
Source: Celestrak
Summary
The satellite USA 72 (NORAD_CAT_ID: 21775, OBJECT_ID: 1991-076A) is a NOSS B type communication satellite launched on November 8, 1991, from the AFWTR launch site using the Titan 403A launch vehicle. The satellite has a cylindrical shape with dimensions of length 3 meters and diameter/span 4 meters. It was manufactured by NRL for the NRO/NRL and carries the SLDCOM 2 payload equipped with a UHF transponder. At launch, its mass was 3000 kg, which is also its dry mass. The satellite’s purpose is communication, and it has no specified power source or motor details provided beyond an unspecified AJ-23-153 motor type.
Physical Characteristics
Length
3
Diameter
4
Span
4
Dry Mass
3000
Launch Mass
3000
Shape
Cyl
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
SLDCOM 2
Purpose
Communication
Mission
Communication
Manufacturer
Naval Research Laboratory
Life Expectancy
Unknown
Bus
NOSS B
Configuration
?
Motor
AJ-23-153 ?
Equipment
UHF transponder
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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