Space Brief 5 Dec 2025
Focusing on military satellite initiatives, defense strategies, and advancements in air and cyber capabilities
COSMOS 1131 (11539)
COSPAR: 1979-084B | Alt Name: Kosmos-1131
Image
Additional Sources
Launch Details
Launch Date
September 25, 1979
Launch Site
PLMSC
Launch Pad
LC132/2
Launch Vehicle
Kosmos 11K65M
Orbital Elements
NORAD ID
11539
International Designator
1979-084B
Epoch
Sat, 04 Jul 2026 05:38:29 GMT
Apogee
Calculating...
Perigee
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Inclination
74.02°
Right Ascension
117.04°
Eccentricity
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Argument of Perigee
163.73°
Period
114.80 min
Mean Motion
12.54 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
COSMOS 1131
Alternative Name
Kosmos-1131
Type
Payload
Status
Unknown
Owner
GUKOSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 11539U 79084B 26185.23505955 .00000006 00000-0 13372-3 0 9998
2 11539 74.0246 117.0393 0045758 163.7290 347.8431 12.54394159141723
Source: Celestrak
Summary
COSMOS 1131 (also known as Kosmos-1131) is a military communication satellite launched by the Soviet Union on September 25, 1979, from the PLMSC launch site using LC132/2 and the Kosmos 11K65M launch vehicle. The spacecraft, manufactured by NPOPM, has dimensions of 0.8 meters in length, diameter, and span with a dry mass of 60 kilograms and was equipped with solar cells and batteries for power. It had a mission duration of approximately six months. The payload consisted of the Strela-1M Blok 23 No. 2 and its shape is described as polyhedral with a radar cross-section (RCS) of 0.6748.
Physical Characteristics
Length
0.8
Diameter
0.8
Span
0.8
Dry Mass
60
Launch Mass
60
Shape
Poly
Radar Cross Section
0.6748
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Strela-1M Blok 23 No. 2
Purpose
Military Communication
Mission
Military Communication
Manufacturer
NPOPM
Life Expectancy
6 months
Bus
Strela-1 11F625
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
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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