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COSMOS 1639 (15621)
COSPAR: 1985-023E | Alt Name: Kosmos-1639
Image
Additional Sources
Launch Details
Launch Date
March 21, 1985
Launch Site
PLMSC
Launch Pad
LC132/2
Launch Vehicle
Kosmos 11K65M
Orbital Elements
NORAD ID
15621
International Designator
1985-023E
Epoch
Sat, 04 Jul 2026 02:38:09 GMT
Apogee
Calculating...
Perigee
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Inclination
74.06°
Right Ascension
305.00°
Eccentricity
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Argument of Perigee
49.51°
Period
115.10 min
Mean Motion
12.51 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 1639
Alternative Name
Kosmos-1639
Type
Payload
Status
Unknown
Owner
GUKOS
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 15621U 85023E 26185.10983237 .00000006 00000-0 13817-3 0 9997
2 15621 74.0573 304.9991 0024900 49.5089 123.1682 12.51058696885623
Source: Celestrak
Summary
COSMOS 1639 (also known as Kosmos-1639) is a military communication satellite launched by GUKOS on March 21, 1985, from the PLMSC launch site using the Kosmos 11K65M launch vehicle. It has dimensions of 0.8 meters in length, diameter, and span, with a dry mass and launch mass both at 60 kilograms. The satellite is equipped with solar cells and batteries for power and carries the Strela-1M Blok 37 No. 5 payload. Constructed by NPOPM, COSMOS 1639 has a polyhedral shape and an RCS of 0.681. Its mission was to provide military communication services with an expected lifetime of six months.
Physical Characteristics
Length
0.8
Diameter
0.8
Span
0.8
Dry Mass
60
Launch Mass
60
Shape
Poly
Radar Cross Section
0.681
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Strela-1M Blok 37 No. 5
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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