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USA 99 (MILSTAR-1 1) (22988)
COSPAR: 1994-009A | Alt Name: Milstar 1
Image
Additional Sources
Launch Details
Launch Date
February 7, 1994
Launch Site
Launch Pad
LC40
Launch Vehicle
Titan 401A/Centaur
Orbital Elements
NORAD ID
22988
International Designator
1994-009A
Epoch
Sat, 04 Jul 2026 01:29:11 GMT
Apogee
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Perigee
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Inclination
17.65°
Right Ascension
27.53°
Eccentricity
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Argument of Perigee
182.84°
Period
1458.66 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
USA 99 (MILSTAR-1 1)
Alternative Name
Milstar 1
Type
Payload
Status
Operational
Owner
AFSMC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 22988U 94009A 26185.06193735 -.00000034 00000-0 00000-0 0 9995
2 22988 17.6503 27.5285 0001247 182.8384 4.8598 0.98720963 33116
Source: Celestrak
Summary
USA 99 (MILSTAR-1 1), also known as Milstar 1, is a military communications satellite operated by AFSMC and launched on February 7, 1994, from LC40 at AFETR using the Titan 401A/Centaur launch vehicle. It has dimensions of 15.5 meters in length, 4 meters in diameter, and spans 35 meters when its deployable solar arrays are extended. The satellite has a dry mass of 4100 kilograms and was designed with an expected lifetime of 10 years. Equipped with LDR and Crosslink payloads along with Milstar DFS-1, the satellite's mission is to provide secure communications services. Its power system consists of two deployable solar arrays and batteries, supporting its operations in orbit since its stable date on February 8, 1994.
Physical Characteristics
Length
15.5
Diameter
4
Span
35
Dry Mass
4100
Launch Mass
4500
Shape
Truss + 2 Dish + 2 Pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Milstar DFS-1
Purpose
Comsat
Mission
Comsat
Manufacturer
LMSC
Life Expectancy
10 years (design)
Bus
Milstar
Configuration
Milstar Bus
Motor
2 x R-4D-12
Equipment
LDR and Crosslink payloads
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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