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RADUGA 28 (21821)
COSPAR: 1991-087A | Alt Name: Raduga
Image
Additional Sources
Launch Details
Launch Date
December 19, 1991
Launch Site
Launch Pad
LC81/23
Launch Vehicle
Proton-K/DM-2
Orbital Elements
NORAD ID
21821
International Designator
1991-087A
Epoch
Sat, 04 Jul 2026 00:28:09 GMT
Apogee
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Perigee
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Inclination
13.35°
Right Ascension
340.94°
Eccentricity
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Argument of Perigee
184.95°
Period
1434.93 min
Mean Motion
1.00 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
RADUGA 28
Alternative Name
Raduga
Type
Payload
Status
Non-operational
Owner
UNKSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21821U 91087A 26185.01955236 .00000042 00000-0 00000-0 0 9998
2 21821 13.3519 340.9355 0004606 184.9544 179.9139 1.00353244126491
Source: Celestrak
Summary
RADUGA 28, also known as Raduga, is a communication satellite with the OBJECT_ID of 1991-087A, belonging to the Raduga bus configuration type KAUR-3 and operated by UNKSR. Launched on December 19, 1991, from TYMSC using LC81/23 launch pad by Proton-K/DM-2 launch vehicle, it has a dry mass of 1800 kg and was manufactured by NPOPM in SU (Soviet Union). The satellite is equipped with 3 Delta-1 C-Band transponders and 3 Delta-2 C-Band transponders for communication purposes. It measures 5.5 meters in length, has a diameter of 2.5 meters, and spans up to 9.5 meters with its deployable solar arrays that also include batteries as part of the power system. The satellite's shape is described as Step Cyl + 2 Pan with an RCS value of 5.0238, indicating its reflectivity characteristics. Its mission was set for a lifetime duration of 3 years and was launched with a mass of 1965 kg.
Physical Characteristics
Length
5.5
Diameter
2.5
Span
9.5
Dry Mass
1800
Launch Mass
1965
Shape
Step Cyl + 2 Pan
Radar Cross Section
5.0238
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Gran' No. 39L
Purpose
Communication
Mission
Communication
Manufacturer
NPOPM
Life Expectancy
3 years
Bus
Raduga
Configuration
KAUR-3
Motor
Unknown
Equipment
3 Delta-1 C-Band transponders, 3 Delta-2 C-Band transponders
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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