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SATCOM C1 (20945)
COSPAR: 1990-100A | Alt Name: Satcom C1
Image
Additional Sources
Launch Details
Launch Date
November 20, 1990
Launch Site
FRGUI
Launch Pad
ELA2
Launch Vehicle
Ariane 42P
Orbital Elements
NORAD ID
20945
International Designator
1990-100A
Epoch
Thu, 02 Jul 2026 15:06:14 GMT
Apogee
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Perigee
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Inclination
13.47°
Right Ascension
15.25°
Eccentricity
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Argument of Perigee
22.68°
Period
1451.86 min
Mean Motion
0.99 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
SATCOM C1
Alternative Name
Satcom C1
Type
Payload
Status
Unknown
Owner
AMCG
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 20945U 90100A 26183.62933325 .00000062 00000-0 00000-0 0 9991
2 20945 13.4656 15.2474 0013930 22.6762 345.5967 0.99182940127147
Source: Celestrak
Summary
SATCOM C1, also known as Satcom C1, is a communication satellite with NORAD identification number 20945 and object ID 1990-100A. It was manufactured by GEEW for AMCG and launched on November 20, 1990, from the ELA2 launch pad at the Guiana Space Centre using an Ariane 42P vehicle. The satellite measures 2.5 meters in length with a diameter of 1.3 meters and spans 15.7 meters when deployed. It has a dry mass of 485 kilograms, launched with a total mass of 626 kilograms. SATCOM C1 is equipped with 2 deployable solar arrays and batteries for power supply and carries 24 (+4) C-band transponders as its primary equipment. Its shape is described as Box + 2 Pan with an RCS value of 5.5537. The satellite was designed to operate for a lifetime of up to 10 years or more, depending on the specific model.
Physical Characteristics
Length
2.5
Diameter
1.3
Span
15.7
Dry Mass
485
Launch Mass
626
Shape
Box + 2 Pan
Radar Cross Section
5.5537
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Satcom C-1
Purpose
Communication
Mission
Communication
Manufacturer
GEEW
Life Expectancy
10 years (#5, 1R, 2R); 12 years (#C1, C3, C4, C5)
Bus
AS3000
Configuration
AS-3000
Motor
TE-M-700-17
Equipment
24 (+4) C-band transponders
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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