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COSMOS 1877 (18336)
COSPAR: 1987-074C | Alt Name: Kosmos-1877
Image
Additional Sources
Launch Details
Launch Date
September 7, 1987
Launch Site
PLMSC
Launch Pad
LC32/1
Launch Vehicle
Tsiklon-3
Orbital Elements
NORAD ID
18336
International Designator
1987-074C
Epoch
Sat, 04 Jul 2026 05:41:21 GMT
Apogee
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Perigee
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Inclination
82.56°
Right Ascension
286.76°
Eccentricity
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Argument of Perigee
31.49°
Period
113.95 min
Mean Motion
12.64 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 1877
Alternative Name
Kosmos-1877
Type
Payload
Status
Unknown
Owner
UNKS
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 18336U 87074C 26185.23705094 .00000051 00000-0 22262-3 0 9992
2 18336 82.5647 286.7599 0001533 31.4907 354.8960 12.63667562790394
Source: Celestrak
Summary
COSMOS 1877, also known as Kosmos-1877, is a military communication satellite launched on September 7, 1987, from the Plesetsk Cosmodrome LC32/1 launch pad using a Tsiklon-3 launch vehicle. The spacecraft has dimensions of 1.6 meters in length and 0.8 meters in diameter with a span of 7 meters. It weighs 225 kilograms both at launch and dry mass, indicating no significant fuel usage for its mission. This satellite was manufactured by NPOPM and is identified as Strela-3 bus type. Equipped with solar cells and batteries for power supply, the satellite’s shape consists of a cylinder plus antennas. Its surface has a radar cross-section (RCS) value of 0.9987, indicating its detectability from Earth. The purpose of COSMOS 1877 is to support military communication needs.
Physical Characteristics
Length
1.6
Diameter
0.8
Span
7
Dry Mass
225
Launch Mass
225
Shape
Cyl + Ant
Radar Cross Section
0.9987
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Strela-3
Purpose
Military Communication
Mission
Military Communication
Manufacturer
NPOPM
Life Expectancy
Unknown
Bus
Strela-3
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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