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LEASAT 4 (15995)
COSPAR: 1985-076D | Alt Name: Leasat 4
Image
Additional Sources
Launch Details
Launch Date
August 27, 1985
Launch Site
Launch Pad
LC39A
Launch Vehicle
Space Shuttle
Orbital Elements
NORAD ID
15995
International Designator
1985-076D
Epoch
Fri, 03 Jul 2026 22:05:38 GMT
Apogee
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Perigee
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Inclination
10.05°
Right Ascension
330.61°
Eccentricity
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Argument of Perigee
337.36°
Period
1472.42 min
Mean Motion
0.98 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
LEASAT 4
Alternative Name
Leasat 4
Type
Payload
Status
Unknown
Owner
HCI
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 15995U 85076D 26184.92058579 -.00000036 00000-0 00000-0 0 9991
2 15995 10.0485 330.6138 0006548 337.3598 36.8270 0.97798161118301
Source: Celestrak
Summary
LEASAT 4, also known as Leasat 4, is a communication satellite launched on August 27, 1985, from LC39A at the Kennedy Space Center using a Space Shuttle launch vehicle. Manufactured by HSES for HCI, it has a cylindrical shape with antennas and measures approximately 4 meters in length, 4.3 meters in diameter, and 6.2 meters in span. The satellite weighs about 1230 kg dry mass and had a launch mass of 3231 kg. It is equipped with 13 UHF transponders for communication purposes and uses solar cells along with batteries for power supply. LEASAT 4 was part of the Syncom IV series and operated for approximately 12 years, providing communication services.
Physical Characteristics
Length
4
Diameter
4.3
Span
6.2
Dry Mass
1230
Launch Mass
3231
Shape
Cyl + Ant
Radar Cross Section
16.6731
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Syncom IV-4
Purpose
Communication
Mission
Communication
Manufacturer
HSES
Life Expectancy
12 years
Bus
HS-381
Configuration
HS-381
Motor
R-4D-10 x2
Equipment
13 UHF transponders
Power System
Solar cells, 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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