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USA 143 (MILSTAR-2 1) (25724)
COSPAR: 1999-023A | Alt Name: Milstar 3
Image
Additional Sources
Launch Details
Launch Date
April 30, 1999
Launch Site
Launch Pad
LC40
Launch Vehicle
Titan 401B/Centaur
Orbital Elements
NORAD ID
25724
International Designator
1999-023A
Epoch
Sat, 04 Jul 2026 05:43:03 GMT
Apogee
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Perigee
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Inclination
28.24°
Right Ascension
302.76°
Eccentricity
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Argument of Perigee
284.45°
Period
153.60 min
Mean Motion
9.38 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 143 (MILSTAR-2 1)
Alternative Name
Milstar 3
Type
Payload
Status
Unknown
Owner
AFSMC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 25724U 99023A 26185.23823255 .00000122 00000-0 99158-3 0 9995
2 25724 28.2410 302.7602 2131754 284.4530 53.0033 9.37517369 73956
Source: Celestrak
Summary
USA 143 (MILSTAR-2 1), also known as Milstar 3, is a military communication satellite launched on April 30, 1999, from Cape Canaveral Air Force Station's Launch Complex 40 using the Titan 401B/Centaur launch vehicle. It has dimensions of 15.5 meters in length and a diameter of 5 meters with a span of 35 meters. The satellite's dry mass is 4200 kg, and it was launched with a mass of 4500 kg. Equipped with LDR, MDR, and Crosslink payloads, its mission is to serve as a communication satellite for military operations. It has two deployable solar arrays and batteries for power generation. The satellite's manufacturer is LMMS (Lockheed Martin Missiles & Space), and it was built using the Milstar Bus configuration. The MILSTAR system is owned by AFSMC (Air Force Space Command) with an expected operational lifetime of 10 years.
Physical Characteristics
Length
15.5
Diameter
5
Span
35
Dry Mass
4200
Launch Mass
4500
Shape
Truss + Ant
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Milstar DFS-3
Purpose
Comsat
Mission
Comsat
Manufacturer
LMMS
Life Expectancy
10 years
Bus
Milstar
Configuration
Milstar Bus
Motor
2 x R-4D-12
Equipment
LDR, MDR 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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